Now you need to config with the switches based off the settings you want. You need to read the readme file in the doc directory or try this commandline in GameEx. reality_boy.exe "[ROMPath]\[RomFile]" -display 800 -sclscr 2 -pallet red Copy and paste that into your command in GameEx. That still doesn't explain why It's not working in GameEx. I say your typin something wrong in there. Like this last time you said reality is not a valid command, it's cuz you forgot the underscore after it.