Some of you might have been wondering what I've been working on.
I've dug around in the Galaga code and I've changed a few things around to enable the "tripleship". I've enclosed a patch file that will enable a new game "galagat". You can run "mame galagat" from the command line or rebuild your game list if you are running a front end. If desired I guess I can post a binary somewhere.
When I started the project MAME was still at v0.135, but this patch file will also run on version v0.137.
Download the attached file into the root of your MAME directory. Then run patch -p1 < patch.txt and recompile.
Enjoy!
Regards,
Cakemeister