hi.i am new to this.i would appreciate help in hacking my psp. i got a psp 3000 limited edition metal gear solid. i bought it on ebay. when i turned it on it said the firmware updated to 6.39.is it possible to hack it now.because i read on this forum that if it is 6.20 you can install 6.20 pro an be done. can i down grade mine to 6.20, and then install 6.20 pro,and hack it that way?. thank you.