@mahoneyt944 actually some games in mame2003 support analog! eg afterburner, outun. but yes, to use analog in games that have native digital controls, you need to use the retroarch 'analog to digital' option (although i would instead recommend setting via the configuration editor as RGUI meddling can be dangerous).
but note that if you enable it globally for the lr-mame2003, you will lose analog controls in natively analog games (although that's only a handful).