: Fetch and inject official game updates into your backup ISOs without connecting to the defunct PlayStation Network.
: You can backup your physical UMD discs directly to your memory card as digital ISO files. Game Updates
ISO Tool 1.31 handles all of that without needing a PC. You can do everything — perfect for on-the-go tinkering. iso tool 131 pspiso
Choose a compression level (Level 9 offers the highest compression but may slightly increase loading times). 2. Fixing Compatibility with Game Patching
Navigate to the "Game" menu on your PSP and select the Memory Stick option. You will see the icon for ISO Tool. Launch it. The application will scan your memory stick and display a list of all ISO and CSO files found in the ms0:/ISO/ folder. Your PSP's UMD drive will also be listed if a disc is inserted. : Fetch and inject official game updates into
ISO Tool is a homebrew application for custom firmware (CFW) PSPs. Its main jobs:
: Navigate the list of detected ISO/CSO files. Pressing the Triangle or Circle button (depending on the region) opens a sub-menu with options like "Convert," "Patch," or "Rename." You can do everything — perfect for on-the-go tinkering
Browse through your ISO folder to find the game you want to patch. Select the game and press Choose your desired option: Select "Prometheus" to apply the necessary patch. Convert: Select "CSO" to compress the file. Wait for the process to complete, then exit to the XMB. Why ISO Tool Remains Relevant in 2026
ISO Tool 1.31 serves as a "Swiss Army knife" for game file management. Its primary capabilities include:
Decrypts and patches EBOOT.BIN files to run newer games on older CFWs.
