Check on google, so much stuff you can do if you have custom firmware. If you have updated in the last year or so it's a PITA. But you have to buy/make what's called a pandora battery. You can find one for like $10 USD on ebay. Good luck, you can play all gameboy games, and i've heard some n64 games. It's crazy what you can do. There are full guides if you look up... {Psp Custom Firmware Tutorial}