i can see now why you are getting the blue screen you probably have to pick the proper media type with the A button on the config screen when you pick your game as in cassette,disc,cartridge. also have it set at atari5200 in the config. personally i would download the newest version of this emu,this is all teething problems as that emu on baed is 4 years old,the newest version probably wont have those hastles. just been reading a post about that emu on the baed disc and you have to mess about with the settings to get it to work.