How to custo firmware on psp 6.31 phat?

hi i have a psp 1004 version 6.31 but i cant play any games from memory stick iv trd to down grade it but cant seem to do it i want to do it with out the pandora battery please help

nickodemus7 years ago
Actually... Keep checking for updates on psphacks.com. Someone is supposedly about to release an exploit for 6.31 using a UMD game.
forget about it you need a pandora battery to my knowledge it's impossible without without using one.