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I've dug my old psp 1003 out after a long while for my boy to play. It is currently running cfw 5.00 M33-6, he wants to play some of the newer games and Gran Turismo do i need to upgrade the cfw or just patch the iso's. If so whats the best guide to follow as there are so many and i've been out the loop for so long i'm not sure where to start now.