Unable to launch gpsp (retropie) from rom collection browser

[ridman]

So, after having installed Retropie and using the solution and applaunch.sh/stop.sh scripts from here, I'm able to launch any of the libretro core emulators (genesis,snes, etc.). Now, I'm trying to do the same with gpsp, but to no avail. Every time I select a gpsp game, xbmc quits, and I immediately get thrown back into XBMC without the game running. I'm experiencing something similar with mupen64 as well. The first time you launch an n64 game, it launches flawlessly, but any time after that behaves like the gpsp emulator.

Anyone have any ideas?