A modern replacement for USBUtil — split PS2 ISOs for OPL/USBExtreme with style.

Features • Screenshot • Installation • Usage • How It Works • Building • License

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What is this?

PS2 ISO Manager is a Windows desktop app that does what USBUtil does — but with a clean, modern UI inspired by Open PS2 Loader (OPL). It splits PS2 ISO files into the USBExtreme/OPL format so you can load games from USB on a real PS2.

No more hunting for ancient, sketchy USBUtil downloads. This is open-source, built with .NET 8, and just works.

Screenshot

Features

• Split PS2 ISOs into 1 GiB chunks in OPL/USBExtreme format
• Auto-detect Game ID by reading SYSTEM.CNF from the ISO (ISO9660 parsing)
• ul.cfg management — add, delete, and rename games with proper binary record handling
• Cover art download from the ps2-covers GitHub archive
• 4 selectable themes — OPL Dark, Midnight, Light, and Cosmic — switch at runtime, persisted across sessions
• Drag & drop ISO files directly onto the window
• Keyboard shortcuts — Ctrl+A add, F2 rename, Del delete, F5 refresh
• Remembers your folder across sessions
• No external dependencies — pure .NET 8 WPF, no NuGet packages needed

Installation

Option 1: Download Release

Download the latest .exe from the Releases page.

Requires .NET 8 Desktop Runtime installed.

Option 2: Build from Source

git clone https://github.com/imadali120/PS2IsoManager.git
cd PS2IsoManager
dotnet run --project PS2IsoManager

Usage

1. Select Folder — Point to your USB drive or the folder where OPL looks for games (e.g. F:\DVD)
2. Add Game — Pick a PS2 .iso file. The app will:
   • Extract the Game ID from SYSTEM.CNF automatically
   • Ask you for a display name (max 32 characters)
   • Split the ISO into 1 GiB chunks with a progress bar
   • Register the game in ul.cfg
3. Download Art — Fetches cover art and saves it to ART/{GAME_ID}_COV.jpg (OPL format)
4. Rename / Delete — Right from the detail panel or keyboard shortcuts
5. Plug USB into PS2 — Boot OPL, your games show up

Drag & Drop

Just drag .iso files onto the window. Multiple files supported.

How It Works

USBExtreme / OPL Format

OPL loads games from USB using a specific format:

Component	Description
ul.cfg	Binary file with 64-byte records for each game
ul.{CRC32}.{GAME_ID}.XX	Split chunk files (1 GiB each)
ART/{GAME_ID}_COV.jpg	Cover art (optional)

ul.cfg Record Layout (64 bytes)

Offset	Size	Field
0x00	32	Display name (ASCII, null-padded)
0x20	15	ul. + Game ID (null-padded)
0x2F	1	Number of chunk files
0x30	1	Media type (0x12 = CD, 0x14 = DVD)
0x35	1	0x08 (USBExtreme magic byte)

OPL CRC32

OPL uses a non-standard CRC32 for naming chunk files. The key differences from standard CRC32:

• Polynomial: 0x04C11DB7
• Inverted branching: XOR when MSB is not set (opposite of normal)
• Table indexed with table[255 - i] instead of table[i]
• Processes strlen(name) + 1 bytes from a 32-byte null-padded buffer

This must match exactly or OPL won't find your games.

ISO9660 Game ID Extraction

The app reads the ISO's Primary Volume Descriptor (sector 16), navigates the root directory to find SYSTEM.CNF, and parses the BOOT2 line to extract the game ID:

BOOT2 = cdrom0:\SLUS_202.65;1
                 ^^^^^^^^^^^
                 Game ID extracted

Project Structure

PS2IsoManager/
├── Models/
│   ├── GameEntry.cs              # Game record model
│   └── MediaType.cs              # CD (0x12) / DVD (0x14) enum
├── Services/
│   ├── OplCrc32.cs               # OPL's non-standard CRC32
│   ├── UlCfgService.cs           # ul.cfg binary read/write
│   ├── IsoSplitterService.cs     # Async ISO chunking with progress
│   ├── Iso9660Reader.cs          # ISO9660 → SYSTEM.CNF → Game ID
│   ├── CoverArtService.cs        # Cover art downloader
│   └── ThemeManager.cs           # Runtime theme switching + persistence
├── ViewModels/
│   ├── ViewModelBase.cs          # INotifyPropertyChanged
│   ├── RelayCommand.cs           # ICommand implementation
│   ├── MainViewModel.cs          # App logic and commands
│   └── GameEntryViewModel.cs     # Per-game UI wrapper
├── Views/
│   ├── GameListView.xaml         # OPL-style game list
│   ├── GameDetailView.xaml       # Cover art + metadata panel
│   └── ProgressDialog.xaml       # Split progress with cancel
├── Converters/                   # WPF value converters
├── Resources/Themes/
│   ├── BaseStyles.xaml           # Shared styles (all themes)
│   └── Colors/                   # Per-theme color palettes
│       ├── OplDarkColors.xaml
│       ├── MidnightColors.xaml
│       ├── LightColors.xaml
│       └── CosmicColors.xaml
├── MainWindow.xaml               # Shell with custom chrome
└── App.xaml                      # Entry point + theme loading

Building

Requirements: .NET 8 SDK

# Build
dotnet build

# Run
dotnet run --project PS2IsoManager

# Publish single-file exe
dotnet publish PS2IsoManager/PS2IsoManager.csproj -c Release -r win-x64 --self-contained -p:PublishSingleFile=true -o publish

Keyboard Shortcuts

Key	Action
Ctrl+A	Add Game
F2	Rename selected game
Delete	Delete selected game
F5	Refresh game list

Acknowledgments

• Open PS2 Loader — the homebrew loader this tool targets
• ps2-covers — PS2 cover art archive
• USBUtil / Tihwin — reference implementations for the USBExtreme format

License

MIT License — do whatever you want with it.