I had my friend hack my PSP, as I'm not familiar with it. According the the system menu, the firmware is 5.50 GEN-D3. Anyway, I know I put the homebrew in the ms0:\PSP\GAME folder. However, I'm having trouble using the homebrew. More specifically, I'm trying to get a GBA emulator working. I've tried VBA and GPSP. The menu can recongnize it, but once I press it, it goes to the PSP logo, and then says it can't be started.