You should be able to put the main power wire through a grommet in the firewall. Make SURE you put the main power fuse as close to the battery as possible. This will protect your car if something should pinch or cut the wire. If you have an aftermarket stereo, run the remote turn-on wire and the RCA wires from the headunit to the rear. You should be able to snake the wires under the door sill plate and carpet to the rear. You may have to remove the back seat to get the wires in the trunk to your amp. When grounding, make your own ground, dont use any factory grounding spots. Scrape some paint away, use a ring terminal, and either screw or bolt the ring terminal to the scraped area. Hope that helps...
__________________ -There are 10 kinds of people. Those who understand binary, and those who do not.
-If we ever forget that we are One Nation Under God, then we will be a nation gone under...Ronald Reagan