Before it was just the umds and I was planning to send my psp somewhere to get it replaced. I was still able to play EBOOTS though but not anymore right now. I'm sure I've played EBOOTS without a umd recognized before but now i get and error 80004 or something. Do EBOOTS and psp games on the memory stick require a umd to be recognized or is it because I just transfered my games to a new 4GB memory stick. Thanks for any help.