I feel your pain. I was in exactly the same situation as you are in and ended up going with an FM Modulator, but quickly discovered that this was not the way to go. After more research I ended up with the solution I discuss in the thread below. I went this direction as I was told by several that the 2002 CD-6 headunit likely did not have the DVD input capabilities. I have not 100% confirmed this, but it would stand to reason since the 2003 DVD player was the first one to not use an FM modulator (again, so I am told).
I also have to clarify that harness of the unit I purchased had been modified so that there were R/L audio connectors and bare wires for the other power lines and grounds. I can try to find that info and pass it along if it would help.
http://www.ford-trucks.com/forums/sh...d.php?t=215896