Remapping Start/Back Buttons for Coinops

[salvio007]

As the title reads - is there a simple way or tutorial to remap the Start/back buttons that bring you back to CoinOps menu when you're on a game?

Reason I desperately need this is because I'm running one of my Xbox's in a Jamma Arcade cabinet, connected through a daughterboard known as the Viletim Card. 

This card, along with 2 hackpads wired to jamma fingerboard, converts the gamepad controls to my arcade control panel...with the exception of the dreaded back button.

Every time I need to plug in a gamepad in order to use that button combo for main CoinOp game selection.

Thanks in advance gentlemen!