I've attempted that with no success, but I have found a work around. I am sure it is something I am not doing properly. I'm building a menu that launches to different programs, mamewah being one of those, was trying to specify via a command line to start specific emulators with separate buttons. Instead,I just put mamewah files into different folders (3 instances so far) and executed them from there, locking the specific emulator I want in the mamewah.ini file. It is working right now with mame, vpinball, PC Games, just kind of toying around to see what I like going to keep adding to it. Thanks for your help minwah. I'll keep pluggin away.