Russell,
Have you had any luck getting this to work ? I am currently looking to buy an 07 expedition with a factory rear entertainment system (DVD).. Then have a D3 intalled. However, I am being told by the ford dealer, and their installer that it cannot be done since the factory radio has a data link to the rear enterainment system.. so net/net.. if i install the avic d3, by rear system is dead. It sounds like you had the same issue and it was solved ? Did it work ? Thanks...