The QMC2 installation can live completely independent from the MAME and MESS installations, so there's actually no use in separating the variants, but it's also a matter of taste...

Regarding the data dir option... well, you're not completely wrong with what you're saying wink , but I recall there's been a reason for an individual option, at least on UNIX/Linux and/or in the past... will check if it's still required, I've forgotten the details (it's a rather old option, and QMC2 meanwhile is 7 years old smile!).


A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]