Not to burden you or anything, Ruatha, but perhaps for a future Version of this utility, do you think you could put in music playlists? I like to listen to thematic music when I play my games - e.g. if I am playing an evil race I will listen to dark, ominous music. So perhaps each PBW game could have an associated playlist, and then the program will play a random selection from that list. So for "Fantasy Empires" where I'm playing as the Hyrule Kingdom I'd have a list of music from "The Legend of Zelda" games and I'd just get a random Zelda tune each time I start up that game.
Just a thought... don't know if it would be too hard for you... What programming language are you using anyway?