ISO Tool v1.966 is released. ISO Tool is a handy homebrew application that lets you manage and backup your UMD's straight from your PSP. ISO Tool completes by Japanese Developer Takka.

ISO Tool v1.965 Changelog:
[NEW] key.txt to add TAG D9161AF0
[BUG] v2/v1 changeover from the R trigger to change the right button (update.txt Akira Osamu notation)
[NEW] Prometheus patch file selection when changing to CFW, × changed as can cancel button

Download: ISO Tool v1.966
Source: Here