Very interesting. I just picked up a 2009 nissan armada, and it also has the color information screen, but does not have DVD, rear camera or NAV. I'm thinking of trying to tie something into the screen, but honestly don't know what modules i have and don't. Looking at the wiring diagrams on alldata, it apears i likely have the av control module, but not much else.
So, do you have notes on you're pinout experiments that might help me get a head start?
I did notice in my investigations of the wiring diagrams, that at least in my 2009 vehicle, the display unit (screen) actually looks like it has both RGBS and COMP inputs. Just a matter of figuring out how to tell it to switch inputs I guess.