hey Nelson - I've just migrated from attractmode and am after the same thing. I've hacked up the ultramap plugin for rocket launcher so it'll work for Launchbox. It's very hacky and will only work for MAME at the moment, but maybe its enough to get you going. I'll probably spend a bit more time on it over the week and see if I can get other platforms working. It should just be a case of running it on start up, but you'll need to edit the included ini config file as well. It has sensible defaults for most mame roms.
If we could get more variables passed to the AHK script you can assign to each emulator in the LaunchBox config then getting this to work would be super easy. Ideally we need to know; the current emulator or system name (i.e. "MAME", "Sega Genesis"), and the ROM you are loading ("aburner", "rracer").
lb_ultramap.zip