I didn't do it. Circuit City goons did. It took them 3 hours. Mounting the antenna was problematic because of the firewall between the cockpit and the rear trunk lid. The solution is elegant and simple. And it is a Skyfi radio. It's wired into the stereo, which is great.
Thee are existing holes in the bottom of the aluminum ledge that the goons were able to use. I think they had to drill one hole, but it's under the A/C controls so you'll never see it.