I just recently got a PSP slim and am running 3.90 M33-3 on it. I decided to make a few back ups of my games, however I am encountering some wierd problems. When i make an ISO of the UMD and place it in the ISO folder, it allows me to begin the game by going games>"game I wanted" the screen goes to the PSP screen and then goes black and resets.
When I turn them into a CSO and try to run them the screen goes black and just stays there.
When I try to run a psx after converting it through popstation It says the data is corrupt.