I am still having problems with this and its driving me nuts!  I have: wellsgarder arcade monitor/arcadeVGA and jpac.  I can get games like moonwalker and wwf wrestlefest working perfectly but when I load up games like mortal kombat the screen is scrolling.  I was told to change the refresh rate to mk stand of 53 or as close as possible but that did not work.  any help with this.  I am using mame32fx and running in XP  Thank you in advanced.
Ryan