help needed with cfw plzzzz!!!

hi guys, i have a original phat ps3 (60gb, cech03) on firmware 4.31. my bluray drive has gone on it again :Angryfire but as i have a slim model aswell i dont need to get it fixed as i never used it much, so was looking to 'jailbreak' it so i can play iso i have downloaded of the games i own on disc, :Jester: i am a noob at this so dont know where to begin or what i would need to do it. i did search through the threads but couldnt find anything with phat on 4.31

thanks in advance for any input :Biggrin2: