diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..112b803
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,35 @@
+# LibRay — Agent Quick Reference
+# Important
+Make sure to use the virtual environment in .venv and not global pip.
+
+## Repo
+- Python 3 CLI tool for decrypting/encrypting/examining PS3 Blu-Ray ISOs
+- Entry point: `libray/libray` (also `libray/libray.py`, identical copy)
+- Package: `libray/` — modules: `core.py` (main logic), `iso.py` (ISO parsing), `ird.py` (IRD parsing), `sfo.py` (PARAM.SFO)
+- Tests: `tests/` — `test_iso.py`, `test_interface.py` (interface test is currently skipped/broken)
+- Tools: `tools/keys2db.py` (builds `libray/data/keys.db` from redump keys), `tools/rpcs3.py` (fetches compat data)
+
+## Commands
+- Install deps: `pip install -r requirements.txt`
+- Run tests: `python -m unittest discover -b`
+- Build sdist + wheel: `python3 setup.py sdist bdist_wheel`
+- Publish: `twine upload dist/*`
+
+## Parallelization
+- Decrypt and re-encrypt support multi-threading via `-p`/`--threads` CLI argument
+- Default: auto-detects CPU core count via `os.cpu_count()`
+- Each sector is independently decrypted (per-sector IV in AES-CBC), making it embarrassingly parallel
+- Uses `concurrent.futures.ThreadPoolExecutor` (threads, not processes, since pycryptodome releases the GIL)
+- Unencrypted regions are always copied sequentially (no crypto needed)
+- Sector data is read upfront into memory, then processed in parallel, then written in order
+
+## Gotchas
+- **Crypto package conflict**: `pycrypto`/`crypto` will break `pycryptodome`. If `ImportError: No module named Crypto.Cipher`, run:
+  ```
+  pip uninstall crypto pycrypto && pip install pycryptodome
+  ```
+- **keys.db is generated**, not committed. Build it with `python3 tools/keys2db.py` (requires keys in `tools/keys/`). It's listed in `.gitignore` via `libray/data/*.db`.
+- **`libray/__init__.py`** dynamically imports all submodules via `pkgutil.walk_packages` — don't expect explicit imports.
+- **`test_interface.py`** is skipped (`@unittest.skip('currently broken')`) — the interface test won't run.
+- `.editorconfig` enforces 4-space indent for `.py`, 2-space for `.yml`/`.yaml`.
+- No linting/typechecking config exists — plain `unittest`, no pytest, no pre-commit.
diff --git a/libray/__init__.py b/libray/__init__.py
index 305c8e6..d6881a2 100644
--- a/libray/__init__.py
+++ b/libray/__init__.py
@@ -24,12 +24,10 @@
 # This script is not included in the release of libray.
 
 import pkgutil
+import importlib
 
 __all__ = []
 for loader, module_name, is_pkg in pkgutil.walk_packages(__path__):
     __all__.append(module_name)
-    try:
-        _module = loader.find_module(module_name).load_module(module_name)
-    except AttributeError:
-        _module = loader.find_spec(module_name).loader.load_module(module_name)
+    _module = importlib.import_module(f'.{module_name}', __name__)
     globals()[module_name] = _module
diff --git a/libray/core.py b/libray/core.py
index 991b9de..741035d 100644
--- a/libray/core.py
+++ b/libray/core.py
@@ -26,6 +26,7 @@ import zlib
 import shutil
 import requests
 from bs4 import BeautifulSoup
+from typing import Any, Optional
 
 
 try:
@@ -44,23 +45,25 @@ GET_IRD_NET_LOC = 'http://jonnysp.bplaced.net/ird/'
 # Utility functions
 
 
-def to_int(data, byteorder='big'):
+def to_int(data: bytes, byteorder: str = 'big') -> int:
     """Convert bytes to integer"""
     if isinstance(data, bytes):
         return int.from_bytes(data, byteorder)
+    return 0
 
 
-def to_bytes(data):
+def to_bytes(data: str) -> Optional[bytes]:
     """Convert a string of HEX to bytes"""
     if isinstance(data, str):
         return bytes(bytearray.fromhex(data))
+    return None
 
 
 ISO_SECRET = to_bytes("380bcf0b53455b3c7817ab4fa3ba90ed")
 ISO_IV = to_bytes("69474772af6fdab342743aefaa186287")
 
 
-def size(path):
+def size(path: str) -> int:
     """Get size of a file or block device in bytes"""
     pathstat = os.stat(path)
 
@@ -74,7 +77,7 @@ def size(path):
     return pathstat.st_size
 
 
-def read_seven_bit_encoded_int(fileobj, order):
+def read_seven_bit_encoded_int(fileobj, order: str) -> int:
     """Read an Int32, 7 bits at a time."""
     # The highest bit of the byte, when on, means to continue reading more bytes.
     count = 0
@@ -90,27 +93,27 @@ def read_seven_bit_encoded_int(fileobj, order):
     return count
 
 
-def error(msg):
+def error(msg: str) -> None:
     """Print fatal error message and terminate"""
-    print('[ERROR] %s' % msg, file=sys.stderr)
+    print(f'[ERROR] {msg}', file=sys.stderr)
     sys.exit(1)
 
 
-def warning(msg, args):
+def warning(msg: str, args) -> None:
     """Print a warning message. Warning messages can be silenced with --quiet"""
 
     if not args.quiet:
-        print('[WARNING] %s. Continuing regardless.' % msg, file=sys.stderr)
+        print(f'[WARNING] {msg}. Continuing regardless.', file=sys.stderr)
 
 
-def vprint(msg, args):
+def vprint(msg: str, args) -> None:
     """Vprint, verbose print, can be silenced with --quiet"""
 
     if not args.quiet:
-        print('[*] ' + msg)
+        print(f'[*] {msg}')
 
 
-def download_ird(ird_name):
+def download_ird(ird_name: str) -> None:
     """Download an .ird from GET_IRD_NET_LOC"""
 
     # Check if file already exists and skip if it does
@@ -118,14 +121,14 @@ def download_ird(ird_name):
         return
 
     ird_link = GET_IRD_NET_LOC + ird_name
-    r = requests.get(ird_link, stream=True)
+    r = requests.get(ird_link, stream=True, timeout=30)
 
     with open(ird_name, 'wb') as ird_file:
         r.raw.decode_content = True
         shutil.copyfileobj(r.raw, ird_file)
 
 
-def ird_by_game_id(game_id):
+def ird_by_game_id(game_id: str) -> Optional[str]:
     """Using a game_id, download the responding .ird from ALL_IRD_NET_LOC"""
     gameid = game_id.replace('-', '')
     try:
@@ -148,26 +151,28 @@ def ird_by_game_id(game_id):
     return (ird_name)
 
 
-def crc32(filename, keep_going=[True]):
+def crc32(filename: str, keep_going: Optional[list] = None) -> Optional[str]:
     """Calculate crc32 for file"""
+    if keep_going is None:
+        keep_going = [True]
 
     with open(filename, 'rb') as infile:
 
-        crc32 = 0
+        crc_val = 0
 
-        while keep_going[0] == True:
+        while keep_going[0] is True:
             data = infile.read(65536)
             if not data:
                 break
-            crc32 = zlib.crc32(data, crc32)
+            crc_val = zlib.crc32(data, crc_val)
 
-        if keep_going[0] == False:
+        if keep_going[0] is False:
             return None
 
-        return "%08X" % (crc32 & 0xFFFFFFFF)
+        return f"{crc_val & 0xFFFFFFFF:08X}"
 
 
-def serial_country(title):
+def serial_country(title: str) -> str:
     """Get country from disc serial / productcode / title_id"""
 
     if title[2] == 'A':
@@ -188,7 +193,7 @@ def serial_country(title):
     raise ValueError('Unknown country?!')
 
 
-def multiman_title(title):
+def multiman_title(title: str) -> str:
     """Fix special characters in title for Multiman style"""
 
     replace = {
@@ -206,7 +211,7 @@ def multiman_title(title):
 
 # Main functions
 
-def info(args):
+def info(args: Any) -> None:
     """Print information about .iso and then quit."""
 
     if args.iso:
@@ -220,7 +225,7 @@ def info(args):
         sys.exit()
 
 
-def decrypt(args):
+def decrypt(args: Any) -> None:
     """Try to decrypt a given .iso using relevant .ird or encryption key from argparse
 
     If no .ird is given this will try to automatically download an .ird file with the encryption/decryption key for the given game .iso
@@ -232,7 +237,7 @@ def decrypt(args):
     input_iso.decrypt(args)
 
 
-def encrypt(args):
+def encrypt(args: Any) -> None:
     """Try to re-encrypt a decrypted .iso using relevant .ird or encryption key from argparse
 
     If no .ird is given this will try to automatically download an .ird file with the encryption/decryption key for the given game .iso
diff --git a/libray/iso.py b/libray/iso.py
index 2fcc04b..df5ce4a 100644
--- a/libray/iso.py
+++ b/libray/iso.py
@@ -23,9 +23,12 @@ import os
 import sys
 import sqlite3
 import pathlib
-from threading import Thread
+import concurrent.futures
+import threading
 import time
-import pkg_resources
+import queue
+from threading import Thread
+from importlib import resources
 from tqdm import tqdm
 from Crypto.Cipher import AES
 
@@ -40,6 +43,28 @@ except ImportError:
     import sfo
 
 
+def _decrypt_sector_worker(disc_key, sector_data, sector_number):
+    """Standalone worker for parallel sector decryption."""
+    iv = bytearray(16)
+    num = sector_number
+    for j in range(16):
+        iv[15 - j] = num & 0xFF
+        num >>= 8
+    cipher = AES.new(disc_key, AES.MODE_CBC, bytes(iv))
+    return (sector_number, cipher.decrypt(sector_data))
+
+
+def _encrypt_sector_worker(disc_key, sector_data, sector_number):
+    """Standalone worker for parallel sector encryption."""
+    iv = bytearray(16)
+    num = sector_number
+    for j in range(16):
+        iv[15 - j] = num & 0xFF
+        num >>= 8
+    cipher = AES.new(disc_key, AES.MODE_CBC, bytes(iv))
+    return (sector_number, cipher.encrypt(sector_data))
+
+
 class ISO:
     """Class for handling PS3 .iso files.
 
@@ -166,127 +191,182 @@ class ISO:
         if args.verbose and not args.quiet:
             self.print_info()
 
+    def _make_iv(self, sector_number):
+        """Build a 16-byte IV from a sector number (little-endian)."""
+        iv = bytearray(16)
+        num = sector_number
+        for j in range(16):
+            iv[15 - j] = num & 0xFF
+            num >>= 8
+        return bytes(iv)
+
+    def _process_region_pipeline(self, input_path, region, num_workers, encrypt_mode, args):
+        """Process an encrypted region using a reader-worker pipeline.
+
+        A reader thread reads sectors from the file and puts them on a queue.
+        Worker threads pull from the queue, process each sector in parallel,
+        and store results. This overlaps I/O with processing for better CPU usage.
+        """
+        num_sectors = (region['end'] - region['start']) // core.SECTOR
+        queue_size = min(64, num_sectors)
+        sector_queue = queue.Queue(maxsize=queue_size)
+        results = [None] * num_sectors
+        results_lock = threading.Lock()
+
+        def reader():
+            with open(input_path, 'rb') as f:
+                f.seek(region['start'])
+                for i in range(num_sectors):
+                    sector_data = f.read(core.SECTOR)
+                    sector_queue.put((i, sector_data))
+                for _ in range(num_workers):
+                    sector_queue.put(None)
+
+        def worker():
+            while True:
+                item = sector_queue.get()
+                if item is None:
+                    sector_queue.task_done()
+                    break
+                idx, sector_data = item
+                _, processed = (_encrypt_sector_worker if encrypt_mode else _decrypt_sector_worker)(
+                    self.disc_key, sector_data, region['start'] // core.SECTOR + idx
+                )
+                with results_lock:
+                    results[idx] = processed
+                sector_queue.task_done()
+
+        reader_thread = threading.Thread(target=reader, daemon=True)
+        reader_thread.start()
+
+        workers = []
+        for _ in range(num_workers):
+            t = threading.Thread(target=worker, daemon=True)
+            t.start()
+            workers.append(t)
+
+        for t in workers:
+            t.join()
+
+        reader_thread.join()
+
+        return b''.join(results)
+
     def decrypt(self, args):
         """Decrypt self using args from argparse."""
 
         core.vprint(f'Decrypting with disc key: {self.disc_key.hex()}', args)
 
-        with open(args.iso, 'rb') as input_iso:
+        num_workers = args.threads if args.threads and args.threads > 0 else os.cpu_count() or 1
+        if num_workers > 1:
+            core.vprint(f'Using {num_workers} threads for parallel decryption', args)
 
-            if not args.output:
-                output_name = f'{self.game_id}.iso'
-            else:
-                output_name = args.output
+        if not args.output:
+            output_name = f'{self.game_id}.iso'
+        else:
+            output_name = args.output
 
-            core.vprint(f'Decrypted .iso is output to: {output_name}', args)
+        core.vprint(f'Decrypted .iso is output to: {output_name}', args)
 
-            with open(output_name, 'wb') as output_iso:
+        total_sectors = self.size // core.SECTOR
 
-                if not args.quiet:
-                    pbar = tqdm(total=(self.size // 2048))
+        with open(args.iso, 'rb') as input_iso, open(output_name, 'wb') as output_iso:
 
-                for region in self.regions:
+            pbar = tqdm(total=total_sectors, file=sys.stdout, disable=args.quiet, leave=True)
+
+            for region in self.regions:
+                region_sectors = (region['end'] - region['start']) // core.SECTOR
+
+                if not region['enc']:
+                    # Unencrypted region — copy sequentially
                     input_iso.seek(region['start'])
-
-                    # Unencrypted region, just copy it
-                    if not region['enc']:
-                        while input_iso.tell() < region['end']:
-                            data = input_iso.read(core.SECTOR)
-                            if not data:
-                                core.warning('Trying to read past the end of the file', args)
-                                break
-                            output_iso.write(data)
-
-                            if not args.quiet:
-                                pbar.update(1)
-                        continue
-                    # Encrypted region, decrypt then write
+                    for _ in range(region_sectors):
+                        data = input_iso.read(core.SECTOR)
+                        if not data:
+                            core.warning('Trying to read past the end of the file', args)
+                            break
+                        output_iso.write(data)
+                        pbar.update(1)
+                else:
+                    # Encrypted region — pipeline: reader thread + worker threads
+                    if num_workers > 1:
+                        processed = self._process_region_pipeline(
+                            args.iso, region, num_workers, encrypt_mode=False, args=args
+                        )
                     else:
-                        while input_iso.tell() < region['end']:
-                            num = input_iso.tell() // 2048
-                            iv = bytearray([0 for i in range(0, 16)])
-                            for j in range(0, 16):
-                                iv[16 - j - 1] = (num & 0xFF)
-                                num >>= 8
+                        # Sequential fallback
+                        input_iso.seek(region['start'])
+                        processed = bytearray()
+                        for i in range(region_sectors):
+                            sector_num = region['start'] // core.SECTOR + i
+                            iv = self._make_iv(sector_num)
+                            cipher = AES.new(self.disc_key, AES.MODE_CBC, iv)
+                            processed.extend(cipher.decrypt(input_iso.read(core.SECTOR)))
+                        processed = bytes(processed)
 
-                            data = input_iso.read(core.SECTOR)
-                            if not data:
-                                core.warning('Trying to read past the end of the file', args)
-                                break
+                    output_iso.write(processed)
+                    pbar.update(region_sectors)
 
-                            cipher = AES.new(self.disc_key, AES.MODE_CBC, bytes(iv))
-                            decrypted = cipher.decrypt(data)
-
-                            output_iso.write(decrypted)
-
-                            if not args.quiet:
-                                pbar.update(1)
-
-                if not args.quiet:
-                    pbar.close()
-
-                core.vprint('Decryption complete!', args)
+            pbar.close()
+            core.vprint('Decryption complete!', args)
 
     def encrypt(self, args):
         """Encrypt self using args from argparse."""
 
         core.vprint(f'Re-encrypting with disc key: {self.disc_key.hex()}', args)
 
-        with open(args.iso, 'rb') as input_iso:
+        num_workers = args.threads if args.threads and args.threads > 0 else os.cpu_count() or 1
+        if num_workers > 1:
+            core.vprint(f'Using {num_workers} threads for parallel re-encryption', args)
 
-            if not args.output:
-                output_name = f'{self.game_id}_e.iso'
-            else:
-                output_name = args.output
+        if not args.output:
+            output_name = f'{self.game_id}_e.iso'
+        else:
+            output_name = args.output
 
-            core.vprint(f'Re-encrypted .iso is output to: {output_name}', args)
+        core.vprint(f'Re-encrypted .iso is output to: {output_name}', args)
 
-            with open(output_name, 'wb') as output_iso:
+        with open(args.iso, 'rb') as input_iso, open(output_name, 'wb') as output_iso:
 
-                if not args.quiet:
-                    pbar = tqdm(total=(self.size // 2048))
+            pbar = tqdm(total=(self.size // 2048), file=sys.stdout, disable=args.quiet, leave=True)
 
-                for region in self.regions:
+            for region in self.regions:
+                region_sectors = (region['end'] - region['start']) // core.SECTOR
+
+                if not region['enc']:
+                    # Unencrypted region — copy sequentially
                     input_iso.seek(region['start'])
-
-                    # Unencrypted region, just copy it
-                    if not region['enc']:
-                        while input_iso.tell() < region['end']:
-                            data = input_iso.read(core.SECTOR)
-                            if not data:
-                                core.warning('Trying to read past the end of the file', args)
-                                break
-                            output_iso.write(data)
-
-                            if not args.quiet:
-                                pbar.update(1)
-                        continue
-                    # Decrypted region, re-encrypt it
+                    for _ in range(region_sectors):
+                        data = input_iso.read(core.SECTOR)
+                        if not data:
+                            core.warning('Trying to read past the end of the file', args)
+                            break
+                        output_iso.write(data)
+                        pbar.update(1)
+                else:
+                    # Encrypted region — pipeline: reader thread + worker threads
+                    if num_workers > 1:
+                        processed = self._process_region_pipeline(
+                            args.iso, region, num_workers, encrypt_mode=True, args=args
+                        )
                     else:
-                        while input_iso.tell() < region['end']:
-                            num = input_iso.tell() // 2048
-                            iv = bytearray([0 for i in range(0, 16)])
-                            for j in range(0, 16):
-                                iv[16 - j - 1] = (num & 0xFF)
-                                num >>= 8
+                        # Sequential fallback
+                        input_iso.seek(region['start'])
+                        processed = bytearray()
+                        for i in range(region_sectors):
+                            sector_num = region['start'] // core.SECTOR + i
+                            iv = self._make_iv(sector_num)
+                            cipher = AES.new(self.disc_key, AES.MODE_CBC, iv)
+                            processed.extend(cipher.encrypt(input_iso.read(core.SECTOR)))
+                        processed = bytes(processed)
 
-                            data = input_iso.read(core.SECTOR)
-                            if not data:
-                                core.warning('Trying to read past the end of the file', args)
-                                break
+                    output_iso.write(processed)
+                    pbar.update(region_sectors)
 
-                            cipher = AES.new(self.disc_key, AES.MODE_CBC, bytes(iv))
-                            encrypted = cipher.encrypt(data)
+            if not args.quiet:
+                pbar.close()
 
-                            output_iso.write(encrypted)
-
-                            if not args.quiet:
-                                pbar.update(1)
-
-                if not args.quiet:
-                    pbar.close()
-
-                core.vprint('Re-encryption complete!', args)
+            core.vprint('Re-encryption complete!', args)
 
     def get_key_from_args(self, game_title, args):
         # key provided with -d / --decryption-key
@@ -313,8 +393,16 @@ class ISO:
         core.vprint('Checking for bundled redump keys', args)
 
         try:
-            db = sqlite3.connect(pkg_resources.resource_filename(__name__, 'data/keys.db'))
-        except FileNotFoundError:
+            db_path = resources.files(__name__).joinpath('data', 'keys.db')
+            if hasattr(db_path, 'read_bytes'):
+                # importlib.resources.abc.Traversable - write to temp file for sqlite3
+                import tempfile
+                with tempfile.NamedTemporaryFile(delete=False, suffix='.db') as tmp:
+                    tmp.write(db_path.read_bytes())
+                    db = sqlite3.connect(tmp.name)
+            else:
+                db = sqlite3.connect(str(db_path))
+        except (FileNotFoundError, AttributeError):
             db = sqlite3.connect((pathlib.Path(__file__).resolve() / 'data/') / 'keys.db')
         c = db.cursor()
 
diff --git a/libray/libray b/libray/libray
index aec94df..08cc1a3 100755
--- a/libray/libray
+++ b/libray/libray
@@ -20,7 +20,29 @@
 # along with libray.  If not, see <https://www.gnu.org/licenses/>.
 
 
+#!/usr/bin/env python3
+# -*- coding: utf8 -*-
+
+# libray - Libre Blu-Ray PS3 ISO Tool
+# Copyright © 2018 - 2024 Nichlas Severinsen
+#
+# This file is part of libray.
+#
+# libray is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# libray is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with libray.  If not, see <https://www.gnu.org/licenses/>.
+
 import argparse
+import sys
 
 
 try:
@@ -29,8 +51,7 @@ except ImportError:
     import core
 
 
-if __name__ == '__main__':
-
+def main():
     parser = argparse.ArgumentParser(
         description='A Libre (FLOSS) Python application for unencrypting, extracting, repackaging, and encrypting PS3 ISOs')
 
@@ -47,6 +68,7 @@ if __name__ == '__main__':
     optional.add_argument('-r', '--re-encrypt', dest='reencrypt', help='Re-encrypt .iso', action='store_true')
     optional.add_argument('-c', '--checksum', dest='checksum', help='Allow fallback to CRC32 checksum (disabled by default)', action='store_true')
     optional.add_argument('-t', '--checksum-timeout', dest='checksum_timeout', type=int, help='How many seconds to wait for CRC32 checksum (default 15)', default=15)
+    optional.add_argument('-p', '--threads', dest='threads', type=int, help='Number of threads for parallel decryption/encryption (default: number of CPU cores)', default=0)
     optional.add_argument('--info', dest='info', action='store_true', help='Print info about .iso or .ird, then quit.')
 
     args = parser.parse_args()
@@ -61,3 +83,7 @@ if __name__ == '__main__':
         core.encrypt(args)
     else:
         core.decrypt(args)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/libray/libray.py b/libray/libray.py
index aec94df..08cc1a3 100755
--- a/libray/libray.py
+++ b/libray/libray.py
@@ -20,7 +20,29 @@
 # along with libray.  If not, see <https://www.gnu.org/licenses/>.
 
 
+#!/usr/bin/env python3
+# -*- coding: utf8 -*-
+
+# libray - Libre Blu-Ray PS3 ISO Tool
+# Copyright © 2018 - 2024 Nichlas Severinsen
+#
+# This file is part of libray.
+#
+# libray is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# libray is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with libray.  If not, see <https://www.gnu.org/licenses/>.
+
 import argparse
+import sys
 
 
 try:
@@ -29,8 +51,7 @@ except ImportError:
     import core
 
 
-if __name__ == '__main__':
-
+def main():
     parser = argparse.ArgumentParser(
         description='A Libre (FLOSS) Python application for unencrypting, extracting, repackaging, and encrypting PS3 ISOs')
 
@@ -47,6 +68,7 @@ if __name__ == '__main__':
     optional.add_argument('-r', '--re-encrypt', dest='reencrypt', help='Re-encrypt .iso', action='store_true')
     optional.add_argument('-c', '--checksum', dest='checksum', help='Allow fallback to CRC32 checksum (disabled by default)', action='store_true')
     optional.add_argument('-t', '--checksum-timeout', dest='checksum_timeout', type=int, help='How many seconds to wait for CRC32 checksum (default 15)', default=15)
+    optional.add_argument('-p', '--threads', dest='threads', type=int, help='Number of threads for parallel decryption/encryption (default: number of CPU cores)', default=0)
     optional.add_argument('--info', dest='info', action='store_true', help='Print info about .iso or .ird, then quit.')
 
     args = parser.parse_args()
@@ -61,3 +83,7 @@ if __name__ == '__main__':
         core.encrypt(args)
     else:
         core.decrypt(args)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/libray/py.typed b/libray/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/requirements.txt b/requirements.txt
index 3e249d6..680254f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,3 @@ tqdm~=4.66.2
 pycryptodome~=3.20.0
 requests~=2.31.0
 beautifulsoup4~=4.12.3
-html5lib~=1.1
-setuptools~=69.1.1
diff --git a/setup.py b/setup.py
index 416f5da..30ee147 100755
--- a/setup.py
+++ b/setup.py
@@ -19,14 +19,16 @@ setup(
   author_email="ns@nsz.no",
   url="https://notabug.org/necklace/libray",
   packages=['libray'],
-  scripts=['libray/libray'],
+  entry_points={
+    'console_scripts': [
+      'libray=libray.libray:main',
+    ],
+  },
   install_requires=[
     'tqdm~=4.66.2',
     'pycryptodome~=3.20.0',
     'requests~=2.31.0',
     'beautifulsoup4~=4.12.3',
-    'html5lib~=1.1',
-    'setuptools~=69.1.1',
   ],
   include_package_data=True,
   package_data={'': ['data/keys.db']},
diff --git a/tests/test_iso.py b/tests/test_iso.py
index 3c7f2c8..25de326 100644
--- a/tests/test_iso.py
+++ b/tests/test_iso.py
@@ -62,7 +62,7 @@ class TestISO(unittest.TestCase):
             {'start': 1024, 'end': 2048, 'enc': False}
         ]
 
-        with mock.patch('iso.ird.IRD', return_value=ird) as mock_ird:
+        with mock.patch('libray.iso.ird.IRD', return_value=ird) as mock_ird:
             returned_key = fake_iso.get_key_from_args('AAA', mock_args)
             mock_ird.assert_called_once_with('aaa.ird')
             self.assertEqual(decryptkey_bytes, returned_key)
@@ -84,7 +84,7 @@ class TestISO(unittest.TestCase):
             {'start': 0, 'end': 512, 'enc': False},
         ]
 
-        with mock.patch('iso.ird.IRD', return_value=ird) as mock_ird:
+        with mock.patch('libray.iso.ird.IRD', return_value=ird) as mock_ird:
             with self.assertRaises(SystemExit):
                 fake_iso.get_key_from_args('AAA', mock_args)
 
@@ -107,7 +107,7 @@ class TestISO(unittest.TestCase):
             {'start': 2000000000, 'end': 2000001000, 'enc': False}
         ]
 
-        with mock.patch('iso.ird.IRD', return_value=ird) as mock_ird:
+        with mock.patch('libray.iso.ird.IRD', return_value=ird) as mock_ird:
             with self.assertRaises(SystemExit):
                 fake_iso.get_key_from_args('AAA', mock_args)
 
@@ -122,7 +122,7 @@ class TestISO(unittest.TestCase):
         fake_iso.size = 512 * 1024 * 1024
         fake_iso.game_id = 'TCUS-12345'
 
-        with mock.patch('iso.sqlite3') as mocksql:
+        with mock.patch('libray.iso.sqlite3') as mocksql:
             decryption_key = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
             decryptkey_bytes = core.to_bytes(decryption_key)
             mocksql.connect().cursor().execute().fetchall.return_value = [['AAA', decryptkey_bytes]]
@@ -140,7 +140,7 @@ class TestISO(unittest.TestCase):
         fake_iso.size = 512 * 1024 * 1024
         fake_iso.game_id = 'TCUS-12345'
 
-        with mock.patch('iso.sqlite3') as mocksql:
+        with mock.patch('libray.iso.sqlite3') as mocksql:
             decryption_key = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
             decryptkey_bytes = core.to_bytes(decryption_key)
             mocksql.connect().cursor().execute().fetchall.side_effect = [[], [['AAA', decryptkey_bytes]]]
@@ -158,7 +158,7 @@ class TestISO(unittest.TestCase):
         fake_iso.size = 512 * 1024 * 1024
         fake_iso.game_id = 'TCUS-12345'
 
-        with mock.patch('iso.sqlite3') as mocksql:
+        with mock.patch('libray.iso.sqlite3') as mocksql:
             decryption_key = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
             decryptkey_bytes = core.to_bytes(decryption_key)
             mocksql.connect().cursor().execute().fetchall.return_value = [['AAA', decryptkey_bytes],['BBB', decryptkey_bytes]]
@@ -177,7 +177,7 @@ class TestISO(unittest.TestCase):
         fake_iso.size = 512 * 1024 * 1024
         fake_iso.game_id = 'TCUS-12345'
 
-        with mock.patch('iso.sqlite3') as mocksql:
+        with mock.patch('libray.iso.sqlite3') as mocksql:
             mocksql.connect().cursor().execute().fetchall.return_value = []
             with self.assertRaises(SystemExit):
                 fake_iso.get_key_from_args('AAA', mock_args)
@@ -195,12 +195,12 @@ class TestISO(unittest.TestCase):
         fake_iso.size = 512 * 1024 * 1024
         fake_iso.game_id = 'TCUS-12345'
 
-        with mock.patch('iso.sqlite3') as mocksql:
+        with mock.patch('libray.iso.sqlite3') as mocksql:
             decryption_key = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
             decryptkey_bytes = core.to_bytes(decryption_key)
             fakeresults = ([], [], [['AAA', decryptkey_bytes]])
             mocksql.connect().cursor().execute().fetchall.side_effect = fakeresults
-            with mock.patch('iso.core.crc32', return_value='01010101'):
+            with mock.patch('libray.iso.core.crc32', return_value='01010101'):
                 returned_key = fake_iso.get_key_from_args('AAA', mock_args)
                 self.assertEqual(decryptkey_bytes, returned_key)
 
@@ -217,9 +217,9 @@ class TestISO(unittest.TestCase):
         fake_iso.size = 512 * 1024 * 1024
         fake_iso.game_id = 'TCUS-12345'
 
-        with mock.patch('iso.sqlite3') as mocksql:
+        with mock.patch('libray.iso.sqlite3') as mocksql:
             mocksql.connect().cursor().execute().fetchall.return_value = []
-            with mock.patch('iso.core.crc32', return_value=None):
+            with mock.patch('libray.iso.core.crc32', return_value=None):
                 with self.assertRaises(TimeoutError):
                     fake_iso.get_key_from_args('AAA', mock_args)