Very interested in how you end up doing this (how you wire it and which wires you use). This is the next thing on my to do list. I have read something about watching the same ground is used when doing this.

Thanks for your help. I would love to take you up on your offer. Pictures are always welcome. I'm doing this first on a Guns n' Roses. If all goes well 5 other machines will also get the same treatment.

New firmware for both boards - several revisions starting in Aug. since I last updated in Dec.

So playing around with the boot.wav I noticed if I use a long audio file it will keep on playing even when gameplay is started. Is their a way to stop it playing or am I just stuck using a short sound file. I thought it might be neat have music playing until the a game was started...

I think I might be having the same problem. Indiana Jones only seems to work with the 1 endproduckt mix. When I try and put a 2nd one on thing go haywire.