http://www.lincolnvscadillac.com/showthread.php?t=15063
http://www.lincolnvscadillac.com/showthread.php?t=16949
Those two threads have some installed pics. I tried to cut the faceplate on a donor and warped it (too much spin with the dremel). If you look at the pics on the 2nd page of the first link above, that's an aftermarket unit stuffed in a 03+ NAV system faceplate. I just ordered the faceplate today and will need to paint it black after it's all said and done, but that's what it should look like.
The only really custom install things is mounting into the faceplate and fabbing up the bracketry with the proper offset to look factory.
I'm going to run things by Audio Depot on Route 306 in Mt. Holly first because I've worked with them before and haven't had a complaint. Hopefully we'll have this sucker in and running soon. Overall goal is to look factory, and like the page 1 pics of the first link (we're adding the additional wood grain kit once it's in).