Hey speedy, how did you setup a nav system and about how much did it cost you overall? I understand the screen is just an Alpine head unit, but does it need to be specially equipped or just have a video input... etc. Could you give me a list of equipment that's required? I travel alot and would love to have this option in the Z. Thanks a lot man, your car is a beautiful as ever... glad our Z's can keep up with those porches. - Matt