You'll have to be more specific, Sheep. What file are you trying to boot? The DOSbox shortcut from the PSP menu, or a game inside DOSbox? Unfortunately there isn't a very simple way to just explain it all, but I can try and help you out. Why don't you start by telling me what PSP firmware you're run...

I've gotten DOSBox running and for those who may have issues, read www.dosbox.com/wiki/Psp_dosbox It links to some better guides that I also used. Anyone know how to re-map the mouse keys and maybe F keys in a .BAT file? I also have ran Eye of the Beholder 2 and 3 at very playable speeds. And almost...