GTA2
Outrun 2006 Coast 2 Coast*
Need for Speed: High Stakes* (for its 2-player splitscreen mode)
Lego Star Wars
Star Wars Starfighter*
Grid Wars**
Guilty Gear X2 #Reload
Super Mario War (this is the only one i
really recommend for any cab)
* Admittedly pretty useless with my all-digital control panel. I have two USB extensions in my cab that I have 2 Logitech dual-action pads for... for 4 player games, and inevitably for playing these ones too.
** Barely playable at my max res of 640x480. will probably get rid of it.
they all open and close through MaLa without any problems at least

and i'm pretty sure most don't require any keypresses. but it would be a good idea to simulate some for anything that does, yeah.
thanks for the tip on Demonstar.
i had Mugen for a while, with a pretty good
looking screen/character pack download. but having at least a dozen awesome fighters in MAME, i just didn't see the point of dealing with it.