Pspiso: Iso Tool 131
: Select an ISO and choose the compression option to reduce its size. To Play Games
: It allows for renaming files, viewing game information, and organizing the ms0:/ISO/ folder. How to Install and Use ISO Tool 1.31
: Converts standard ISO files into Compressed ISO (CSO) format. Level nine compression offers the maximum space savings.
Place the iso_tool folder into the PSP/GAME/ directory of your Memory Stick.
For PSP (PlayStation Portable) enthusiasts during the late 2000s and early 2010s, keeping up with the latest game releases was a constant challenge. Sony continually updated the PSP’s firmware with new security measures, designed to prevent the latest games from running on custom firmware (CFW). Enter —a game-changing homebrew application that allowed users to decrypt, patch, and convert game ISOs directly on the device. This article provides a complete guide to ISO Tool 1.31, covering everything from its core features to installation steps, usage instructions, and troubleshooting tips. iso tool 131 pspiso
ISO Tool 131 is a software application that enables users to create, edit, and manage ISO files. It is a powerful tool that supports a wide range of features, including the creation of bootable ISO files, extraction of files from ISO images, and the ability to merge multiple ISO files into one.
To use ISO Tool, your PSP must already run custom firmware, such as PRO, ME, or modern ARK-4 setups . 1. Installation Step-by-Step
Choose the appropriate option, such as or Decrypt EBOOT .
: Apply "Prometheus" or other version-specific patches to allow games requiring newer firmware to run on older CFW (Custom Firmware) versions. : Select an ISO and choose the compression
: Users can use the tool to update ISO games directly. It can generate "GetUpdater" files to download official game updates from Sony's servers and then merge those updates into the digital backup.
: Allows for temporary firmware shifts to run specific software without a permanent change to the system. Installation Guide Download and Extract
| Tool | Platform | Best For | | :--- | :--- | :--- | | (Yet Another CSO Compressor) | Windows PC | Batch compressing 100+ ISOs at maximum speed. | | PSP ISO Compressor | Windows PC | A GUI version of CISO; very easy for beginners. | | UMDGen | Windows PC | Extracting and rebuilding ISOs manually. | | ARK-4 CFW Built-in Patcher | PSP | Modern firmware automatically decrypts on the fly. |
Choose the patch type. For most modern 6.60/6.61 issues, options like or Fix for 6.xx work best. The tool will analyze and patch the EBOOT/SFO files. Once completed, try launching the game again from the XMB. Common Features of the ISO Tool Menu Level nine compression offers the maximum space savings
: Ensure all .iso and .cso files sit in the ISO folder at the root of the Memory Stick. Partition Error Cause : Corrupted Memory Stick file system.
Setting up ISO Tool 1.31 requires a PSP running custom firmware. Prerequisites A PSP with operational CFW (e.g., PRO-C, ME, or LME). A Memory Stick Pro Duo with sufficient free space. A USB data cable or a card reader. Step-by-Step Installation : Obtain the ISO Tool 1.31 archive file. Connect : Connect the PSP to your computer via USB mode. Navigate : Open the PSP folder on your Memory Stick. Locate : Enter the GAME directory.
Open the root folder of your memory card and navigate to PSP -> GAME .
