I realize that this question is going to reek of n00bness, but please help me out. I received today the GPS extension kit. Initially I was at a complete loss as to how I should install it. Fumbling around, I figured out that I had to dislodge the two rubber plugs covering some sort of holes. I used a sharp object to do that. Then, I managed to push the GPS unit in and lock it in place. Then, ... [tumbleweed]... I had no clue what to do with it or even how to use it. Is here some sort of a GPS app that I should look up? Thanks in advance.