so i just had a long talk with the installer.
he is knowledgable and claims there is a way to feed the nav/gps signal into the existing screen and that through this "feed" i would be able to get xm, and other services as well on the existing info center.......
I'm a betting man by nature. I want to officially wager $100.00 it can't be done on a coupe/spyder. If I'm wrong, I want the details of how it's done on a Magneti Marelli NIT (worth every penny). You might want to put your installer on the hook for the bet since he's so sure.... Let us know how it turns out..... Remind him you don't have a Quattroporte...
As a side, there are a LOT of coupe/spyder owners on here that haven't figured it out since 2002. Do you know the only guy in the US that can do it? If so, he's a rich man!