OK. Verified with the Florida dealership that did "Mdrums" installation that the CD player is indeed the USA Spec SCD-G7i. It is available through
http://www.discountcarstereo.com or
http://www.crutchfield.com. Crutchfield do not list it as a compatible CD player for the '05 H2 but all the other source say it is.
Getting the dealership to install the SCD-G7i CD player and put in the USA Spec SVG 707 Auxiliary input adapter to handle the rear DVD players. The cool thing about the input adapter is that the NAV unit will recognize the DVD player and a DVD icon should pop up -- just hit the "Band" button to select the DVD input. Will get a relay switch put in to switch between the two DVD players -- will hardly ever use it.
I highly doubt there will be any problems with this setup. Thanks to Klaus for his expertise. I will follow up with a post to confirm this configuration.
Greenhummer '05 Lux with NAV/XM/CD/DVD