Iso Tool 131 Pspiso Link <WORKING — RELEASE>

have largely automated these processes, but 1.31 remains a significant piece of PSP homebrew history for those reviving older handhelds. to avoid manual patching altogether? PSP Homebrew: The Ultimate Setup Guide (2025)

Sony released Firmware 6.20, 6.35, and 6.60. Each update added new encryption keys. ISO Tool 131 allows you to patch an older ISO with "Prometheus-6" so it thinks it is running on newer firmware. iso tool 131 pspiso