Connect your PSP to your computer via USB and enable "USB Connection" from the PSP’s XMB (XrossMediaBar). Navigate to the PSP folder on your Memory Stick and then open the GAME folder. Copy the entire iso_tool folder into the PSP/GAME/ directory.
Decrypts and patches EBOOT.BIN files to run newer games on older CFWs. iso tool 131 pspiso
Unlocking Your PSP's Potential: A Deep Dive into ISO Tool 1.31 Connect your PSP to your computer via USB
Converting uncompressed .iso files to compressed .cso (Compressed ISO) formats to save space on memory sticks. iso tool 131 pspiso
ISO Tool was essential for PSP users running Custom Firmware (CFW) or Homebrew Enablers (HEN) like Total_Noob’s TN-HEN or Pro CFW. Its main features included: