Grand Theft Auto - Vice City Stories

[TheDax]

That's not an issue specific to this game. That said, make sure you have PPSSPP in the same directory as the assets folder, so it resembles something like this(it obviously doesn't have to be in the same path as this example):

C:\Games\PSP:
|-assets
|-PPSSPPWindows.exe

If, for some reason you don't have an assets folder, re-download 0.9.1 official, or try a newer development build.