I got my F900 installed at Circuit city, and they tried to do the bypass for me but never got it to work, I ended up getting it to work by pulling out the deck myself and redoing it. They hadn't properly moved the pin or grounded the parking brake wire. (Yes this was for the wired bypass, but i figured it was still relevant) So this is something that is fairly easy to do, grounding the parking brake that is, you can probably do it yourself.