hey i have a psp 3000 but my system software version is currently 4.20 .i really want to play games from memory stick .i am a noob in psp i really need some help in this 1 .iv tried to check updates within the psp but the update says i already have a better version (4.20) so there is point in installing 4.2 version .gt any idea to wat 2 do m8?