Thanks for the diagram soundman. Makes it easier knowing what wires are for what and where the switch is actually located. I'll also call the Chevy dealership tomorrow that did some electrical work on the Caddy for me to make sure it's the corrent wire. If it is, I'll jack the car up, drill a small hole through the hump over the transmission, drop the wire straight down and tap it with a butt-splice. As always, I'll make sure to post pics to help others with their installs too. For the 100w speaker, I'll be removing the ground effects from the bottom of the front bumper so I can drill and tap the C channel to mount the speaker. Just wish it was a solid cross member like the Caddy has, but should still be pretty easy.
While the whole install is taking place, I'm going to continue driving the Caddy. Got the metal cut tonight using a piece I cut out of a desktop side panel for a friend that had me install a piece of custom etched plexi in it with the Detroit Lions logo and a couple blue LEDs.
Already picked the perfect spot to mount the pc and amp in teh back. I'll be attaching them to the panels that fold down when the reat seats are folded. Once that's done, I'll be building a custom enclosure to protect them and the wiring and adding 4 120mm fans for additional cooling. Hope this install goes better than the Caddy.
Stay tuned for updates and pics.