Excellent, thanks guys. I also have a couple of questions for my stock factory basic low grade system-I plan on just adding speakers to the rear pillars, and perhaps the standard sub later on, but I am curious as to what is already installed-
1. Wires are already run, correct?
2. Is the factory stereo already able to power these extra speakers?
3. Are the wires already connected to the stereo, so that if I plug in speakers, they will begin to work? (I understand there is some kind of switch in-line with the sub but what about the rear pillar option? Will they work upon being plugged into the pillar wires?)

-R-