That would suck to have to remap every game. Any way to make the spinner mouse 0 by default?
If you don't mind not using the mouse for spinner games (which it sounds like you're asking for in the above question), just make
mame's default dial mouse 2 (or whatever mouse # your spinner is); remap once and you're done:
Start mame, tab, input general, player 1, dial analog, enter, spin spinner.
Now mame is using the spinner for all dial player 1 inputs. (As long as you don't remap specific game's dial player 1.) Plus trackball and lightgun games are still mouse controlled.