I know its taken a long time but I think I've finally cracked this. The answer is a bit crappy but it works. Will be posting a new version soon.
Awesome. Thanx lambo....been away from the car pc for a while but this was one of the few issues I had left.
Well I've said it before but now I've def cracked it. Had to completely rewrite it but its ready so who wants to test it? Anynumber of screens all with thier own sound cards (tested with usb)
Here you go
1) must have vlc 1.1.11 installed
2) Read the readme on how to set up the soundcards. Its a pig and the only way to do it right is the way described.