DOES THE Z1 HAVE DUAL OR TRI ZONE CONTROL. IF YES HOW DO YOU CONTROL WHAT SCREEN SEES WHAT, AND WHAT SPEAKERS PLAY WHAT. i HAVE TWO HEADREST SCREENS.

PS. I KNOW NAME IS GS300Z2, BUT IT SHOULD BE GS300Z1. TO MUCH HASSEL TO HACK THE Z2

Go to the source menu, press the rear screen button to switch between mirror (shows whats on the front) and DVD. The speakers play whats on the front screen