MALA or Soft 15KHz question: how to specify video res on a per mame rom basis?

[retrometro]

I've tried to search through this thread but haven't seen it (or maybe it belongs to another thread) so please don't kill me if this has been asked before.

is there a way to specify on a per mame game basis whether it should switch resolutions or just scale using the current resolution?  By default I'd like games to switch res but for vector games or ones that have too many artifacts, I'd rather scale.

thanks tons in advance!

... I should clarify that I'm running MALA for the front end so I can't run mame with separate switches for each game.

[retrometro]

I've gotten all my answers (including questions I didn't know I had) in the monitors forum.

Thanks tons to JaG and SailorSat.