This is actually my first post, so bear with me
I just added the cable last week and I did it with removing the battery. Probably easier and safer.
I installed the connector in the ashtray right above the cigarette "hole".
After removing the radio and cd, I also removed the climate control (just push it out but don't disconnect it). You will feed the cable down and fish it through the ashtray.

Check out this link.
http://www.xoutpost.com/electronics/...eferences.html