I haven't messed with my PSP in awhile and forgot how all this works. I wanna play Dragon Warrior 7, it's a multi disc eboot but the option to change discs is greyed out. Is this normal? 5.50 Prometheus is my firmware. I read I can change discs when the prompt comes up but this game is freakishly long I don't wanna finish disc 1 and not be able to start disc 2.