What do you think about this?

 

 

Is it possible?

TomTom, iGo Primo, Ozi, Garmin and Navigon, all at once

yes it's possible.

Read here

http://avic411.com/index.php?/topic/16195-leetlauncher-v30/

and here

http://pioneernavgate.blogfree.net/?t=3453274