one of my frnd bought a psp 3004 with 6.39 it was hacked by the seller itseems there are few pre loaded iso which he is able to play.
It says 6.30 PRO-B7

Now he wants to play some older games of god of war , burnout series etc.. can i use my old images downloaded for my 5.03mhu or have to do something else to play the games