unless you open your psp and phisically brake somthing things like a "brick" are fixable with the pandora battery
brick - the name was picked as your psp is now as fun and useful as a brick
how you get a brick:
corupt flash0
delete flash0
turn off psp remove memory card while upgrading downgrading
couldnt think of any other ways but u get the point
Pandora batery is easiest made by someone who has a custom firmware psp already but if u dont have acces to that u can make one by opening and removing a pin in the batery otherwise check my thread for it or u can look on ebay to buy one