I am thinking about purchasing an in-dash 6.5" flip out monitor and dvd player for my daily. My question is there any way to watch a dvd and play some other source over top of it such as a cd in the changer or xm radio. This is probably a dumb question but I ask because more than likely what ever dvd is playing my passengers have seen. I know I would not be paying close attention to what they are saying being I already know. I'd rather listen to some music over the dvd image.