haha I'm having problems with it already, so I put the nav CD in the unit in the back. And it says invalid cd or something like that. Am I doing something wrong?

Is your car equipped with a CD Nav or DVD Nav?

DVD Nav

I believe only the last generation of NAVTECH CDs will work in the DVD system, and earlier version won't work correctly as the software is not setup to read it. You need to find a NAVTECH DVD for it to work correctly anyway...

Yeah the case says NAVTECH and has a DVD Symbol on it :dunno

Then you have the DVD... If it still isn't recognizing it, that means there is a problem with the DVD drive itself.

Ok, when I get my alarm installed next Wensday I'll just ask them about it.