Ok so i recently just joined here, hi guys. What i want to do is Unhack my psp from Fw 5.50 to 6.35 i know its a bad idea but i have my reasons why i want to do this. today it was Fw 4.10 and i updated it to 5.50 and alls went well and then it would not update. i Tried to use network update but i get an error called (DRNFFFFFFD7) and it would not let me update. SO i tried Chilly willys keyCleaner and i did like the directions say but when i go to (Game) to look at the file to turn it on it says the game cannot be played it is Coruppted, and now i am basically giving up unless anyone has any idea how to get my psp from Version 5.50 to atleast 6.20 ._. any help would be really awesome, and sorry for my english. i am not american if you need more information please feel free to ask me for more.