If you want to save yourself some wire:
If you have the JBL system there is a switched power wire at the amp (under the passenger seat). Diagram here:
http://crutchfield.custhelp.com/cgi-...i=&p_topview=1
(#12, gray wire)
You can also tap into the 12v power plug in the center console near the armrest. The wire for that one is red. You do *not* need to remove the console to get to this wire, the carpeting is in two sections, velcro'd together, so you can simply peel it apart to expose the wire.
In both cases you need to remove the passenger seat but you'd be doing that anyway to run the wire from the engine bay (and make your life easier). This is the only thing that needs to be removed in either case to get to these wires.