Xbox Navigation

Lately I've been running the idea through my head of using an xbox to crate a GPS navigation system for my Jeep. I figured about $90 for a used xbox, if I can find one (since there seems to be a shortage these days), $80 for the Streets and Trips package with GPS module and another $100 or so for an inexpensive LCD screen. Of course I turned to the great and bountiful thing called the internet for answers. This was my first stop . Nothing ever changes. The internet is still full of retards.