A friend of mine has been asking me if I could install a Custom Firmware on his PSP-3000 with 6.20 official firmware. I have searched for answers on the net a couple of times but all that I have reached so far is to run homebrews using the HBL (Half-Byte Loader).
The latest released PSPs have official firmwares of 6.20, 6.31, and 6.35 which also includes the PSP Go. A lot have been wondering if is it possible to install Custom Firmwares on these PSPs? Well the truth is...NO. Sony's PSP developers have been adding security features to the latest firmwares to prevent users from hacking it and play homebrews. Does this mean that these PSP owners have to stick to UMDs? The good news is NO! Thanks to Total_Noob (developer of 6.20 TN HEN), Virtuous Flame aka Vflame and Coldbird (developer of 6.31 and 6.35 HEN) and Liquidzigong (developer of Prometheus ISO Loader) you can now play ISO/CSO games on these PSPs.