I finally found the solution to Mamewah launching with game-specific ini files so I figured I would post the info just in case someone else runs into this problem....
Basically Mamewah doesn't recognized ini files, but can recognize cfg files. So set the "game_specific_config_path" to the folder that you'll be saving these config files. These config files will contain the entire commandline that you want to use for that specific game (not just Sound 0 like it's stored in an ini file). And the name of the file must be (name).cfg (example ghouls.cfg). Not ghouls.ini or anything else. With the documentation for Mamewah being a little light, and the game_specific_config_path being a new feature, it took quite a few tries to get this right. Just figured I would pass it along for anyone else in need.