PSP won't let me upload custom firmware,what do i need to do????

Question

it says corrupted data

Answer 1

installing custom firmware isnt as easily installed as official firmware. this is partly due to sony . its their way of preventing people from downloading and playing illegal downloaded psp game backups off their memory. the cfw  and the programs arent illegal, just the pirated games are. you just need to put a little effort to install this though. to install cfw you either make a pandoras battery or borrow one from a friend. heres a vid on how to make one. this will cost you a new battery to make it. and you also have to have any memory bigger than 32mb. the vid is pretty self explanatory, just make sure to watch it all and not just skip through some parts