Trocar CORE

Substituí a linha:

     <command>python /usr/lib/python2.7/site-packages/configgen/emulatorlauncher.pyc %CONTROLLERSCONFIG% -system %SYSTEM% -rom %ROM% -emulator %EMULATOR% -core %CORE% -ratio %RATIO%</command>

Pela linha:
     <command>/usr/bin/retroarch -L /recalbox/share/system/.config/retroarch/cores/snes9x_libretro.so --config /recalbox/share/system/configs/retroarch/retroarchcustom.cfg %ROM%</command>