I am looking to see if a rear entertainment display can be installed. Few things to note: I do NOT want to install those portable DVD players with an ugly strap and nor do I want those head-rest systems. Currently, I am using a 7" Kindle mounted on the passenger back side. Option I am investigating is a monitor and AV wire connected to the head unit @ dashboard. Does the head-unit support dual zone for example? Alternatively, thru the USB tweak I can play video loaded via the USB drive but would like the display sent to the rear unit.