I don't really plan to bypass my N3 as I'm already a shitty driver, and I don't think watching movies would help. But out of curiosity:
When I start my system up a warning pops up that says something about an improper connection of the parking brake lead (I think that's it, I'm going of memory). Does that mean that my parking brake is alreayd grounded and that if I wanted to bypass it I would just have to flip the switch, or is it completely unrelated (and if so, what does it mean). I don't know if it's grounded or not as I had a pro install and frankly I don't know much about these things.
Oh and in case you're curious, the reason I would consider bypassing is to hook up a modded xbox for music. I can't stand the sirius interface, and while the ipod is great, it's just so freaking slow on the menus...