Not sure if it's been posted (search did not turn up anything).

I found a Porsche Cayenne for the Garmin Nuvi.
It's white only but if you know how you can edit it for different color.

How to install vehicle
http://www8.garmin.com/vehicles/howtoinstall/

 

i find it bazare that when i paid £75,000 for my car there is not a way these sort of things could have been added
different voices etc (instead of male/female choice)
colour choices etc
should have a usb hub.....

thats quite cool.