Sorry for repeating, but I found something which does not match to other thread. As I wrote earlier today, something went wrong when I replaced my memory card. I have PSP with 1.5. Simply copied all files from old memory card to PC and without formatting new card installed DH, ISO etc to the new 4GB card. Now only one ISO game works, others "to start, you must upgrade the system software". Also old memory card started same messages. What went wrong and what to do now?