> He has to be using a front-end if he's using a cab. If that's the case go to the > forum of that front-end and I'm sure someone will help you. Also try starting just > clicking on MAME.exe as there is now a built in UI which might give you some ideas > how things work now.
This. Just give it a try. You're not going to make your cabinet explode by typing the wrong thing, and it would save everyone involved a lot of time.