kent...
if you haven't already found it, this website is the best place to start...
the only initial comment i have is that the issue is likely not with the score motor itself, but something else is causing it to continue to run... others with far more 'sperience than i will chime in shortly, no doubt...
hang in there... between clay's site and the guys here, you'll get it working..
edit: do you have a schematic? if not, order yourself one from pinball resource... it will help immensely, as this won't be the only issue you ever have with the machine..
chris
ps... great game, btw...