so I had 3.52 M33 with no updates, and the system played my CSO's of GTA: LCS and VCS fine. Now that I've updated to 3.71 M33-4 it won't play them. This PSP has a bad UMD bay so I can't test my UMDs of anything. recopying as an ISO was a nogo, same for recopying the cso. halp?