Alright, so I ran the power wire through the firewall back through the trunk, ran the RCA's from the head unit to the trunk. I disconnected the factory amp by unplugging it, and then I cut the violet "radio on" wire and spliced it onto a lead for the remote amp turn on... hooked it all up to the amp. Hooked up the sub to the amp.. the amp turns on, and the sub plays. I had the gain all the way down, but it has power and makes sound.

Im going to cut the harness at the factory amp and splice the inputs and outputs together for the rear deck speakers and keep them stock for now.. just so they play.

Now my last obstacle that I couldnt figure out just by looking... Im gunna be doing the doors tomorrow and I'll be running speaker wire from the amp to the doors. What's the best way to get the new speaker wires into the doors? I looked for a bit and I couldnt find an obvious opening to the rubber conduit that goes from the body to the door... any tricks?