I have a PSP with firmware version "303 OEC R+" It's the Japanese make! I have problems with winrar games that contain two files "PSP Game (folder) and UMD_DATA.BIN (file). Some game will load fine when the winrare is placed in the ISO folder,but others will loadup and show messages like "The game could not be started. (80020321)" some numbers are diferent! Why is this and do I need a newer UMD or different disk in the drive? I have GTA LCS, but not the patched version,its the 2.60. Thanks!!