Not sure where in ini, but if you go into the gameex setup wizard under mame settings, down the list look for advanced settings and place that command line in the run on launch. Don't forget to put a command in the run on exit also. ""C:\GameEx\Marquee Magician\Launch MM v2.0.exe "mame" "KILL"" Unless you want it to show a title or picture upon exiting mame at that point.