The most important to me: 1964 Ultrafast, it's a N64 emulator that has an overclocked system so most games run at better framerate than with Project64 (Perfect Dark and GoldenEye in 60fps!).
NullDC Naomi, it's a mod of NullDC to run... Naomi games

For the Taito Type X (and X2), it's easy because it's .exe so i think i can just use the pc games section but can I use a different icon to represent this specific system ?
Some steam games are really cool in an arcade cabinet but I don't know how to launch them like a classic pc game through mgalaxy.
P.S.: May I use Shmupmame and Groovymame like a classic Mame build? Can I integrate them both under the Mame sytem (like what I'd like to do for NullDC and NullDC Naomi)?
Thanks a lot and sorry if it's a newb question, I just started to use mgalaxy instead of hyperspin yesterday and I LOVE IT!

Nocta