Trouble deciding on car speakers? Clicky Clicky
My Myspace page (view my pics for carputer worklog...needs updated)
Speakers: DLS Ultimate Iridium 6.3 Link
Amplifier#1 (Front Stage): DLS Ultimate A4
Amplifier#2 (Sub) removed
If you don't need the second screen for anything else, or aren't fussed about the other screen displaying your regular carputer stuff, best bet is to just have a splitter coming off of the one Video Out, and running to both screens.
I can't quite remember the specifics of how this issue comes about, but it's a Windows thing, rather than videocard/driver specific from memory.