Not possible to make a tool currently. There is no standard way to program AIs, so everyone pretty much does it their own way. If you want to do anything besides a mirror matchup, for example ZvT you can probably just copy one AIs Zerg.galaxy and include files, and the other AI's Terran.galaxy files and included files to a folder and use the launcher with that. But thats not guaranteed to work. If an AI modifies the meleeAI.galaxy file, it probably wouldn't work.