Because of the rapidly shrinking pool of 2006 Honda Civics in my neighborhood, I ended up getting one yesterday w/o a navigation system, although I really wanted one with it. The salesman said that the nav systems come from the factory - it's not something you could upgrade later. I'm not so sure... Although Crutchfield says you can get some that *technicall* will fit, you have to fabricate your own mounting brackets, and significantly change the look of your dash, so I don't like that option. Is it possible to get a Navigation System after delivery, and then just replace the audio console along with the radio? Is this completely insane, or has someone done this before? Thanks! Chris