I've got a slim with 3.71 M33-3.
When I try to run a PSOne game it just says "The game cannot be started. The data is damaged".
The game is located in PSP\GAME and worked without problems on my old PSP.
I tried the popsloader from the dark alex site but it still doesent work (yes, I activated the plugin).
I guess its just a missing plugin or somethig. But which?