Many downloaded PSPISOs have encrypted boot files. If you launch a game and get a black screen or "The game could not be started," the EBOOT is locked. ISO Tool 131 can decrypt it instantly.
A PSP with Custom Firmware (e.g., 5.00 M33, 5.50 GEN, or newer). A Memory Stick Pro Duo. The iso_tool_131.zip (or similar file) downloaded. Download the ISO Tool 131 package. Extract the contents of the zip file. Connect your PSP to your computer via USB. Navigate to PSP -> GAME on your memory stick. Copy the ISO_TOOL folder into the PSP/GAME/ directory. Disconnect your PSP. How to Use: On your PSP, go to Game > Memory Stick and launch ISO Tool .
: Extracts .cso files back to standard .iso format. iso tool 131 pspiso
: Copies physical UMD discs directly to the Memory Stick. Direct Deletion : Deletes game files from the interface. Renaming : Renames ISO files without a computer. Technical Specifications Specification Developer Version Supported Formats ISO, CSO, EBOOT.PBP Interface Language English, Japanese Platform PSP (All models with CFW) Installation Guide
. It was 2011, and Leo was hunched over his desk, his eyes reflecting the blue glow of a forum thread titled "ISO Tool 1.31 – The Ultimate Fix." Many downloaded PSPISOs have encrypted boot files
Some compressed ISOs lose their game icon in the PSP menu. ISO Tool can restore the ICON0.PNG and PIC1.PNG from the original ISO.
If you still own a physical PSP, finding a large Memory Stick (64GB or 128GB via microSD adapters) is cheap. But why waste space? A raw PSP ISO can be 1.6GB. Using ISO Tool 131, you can compress that same game to a , shrinking it by 30-50% without noticeable load time differences. A PSP with Custom Firmware (e
Generates direct shortcut icons on the PSP’s main CrossMediaBar (XMB) menu for quick game launching.