When it comes to the AVIC-Z1, if you don't use a TR-7 or a Ducatiboy flasher, can you still drive around town and have the backseat passengers enjoy TV in the headrest monitors from the Pioneer GEX-P5700TV TV Tuner connected to the AVIC-Z1? Can the backseat passengers watch a DVD if you have one playing while driving? What about a front seat passenger that has a sunvisor monitor?