E70 dual zone audio video?

[SKW]

Just an idea floating in my head. In an E70 X5 w/ factory nav and standard sound system, I wonder if the following is possible. While retaining the factory head unit & nav screen adding a glovebox DVD changer (as comes w/ the prem sound pkg), two flip down monitors in the rear (one behind ea front seat, don't want a center screen that blocks the rearview mirror), and the capability to watch or listen one thing on the front nav screen while watching another on the rear screens. But at the same time whatever is playing in the rear only come through the rear speakers. Basically want to eliminate my daughter using the wireless headphones that most systems come with. I can't find it now but I thought that a few years ago Alpine had a dual zone head unit. Also, I haven't been able to find motorized screens that would both automatically open when the rear source is activated and then automatically close when not in use. Anyone with any info or ideas of where to start would be much appreciated, thanks.