Can some one please tell me how to get the power wire for the amp though the firewall - I couldn't find an opening and not quite sure about where to drill in... (2001 LS</span>) Thanks.</span>

man there is a sweet spot for that. it requires you to pull the inner fender off of the pass (right) Front fender inner liner...(3 screws and 12 plastic clips).
once the liner is off you will see the factory harness that goes from the fusebox/batt area all the way to the door jam.
there is a rubber boot in the door jam make a small slit in it with a razor and your set.
doing this will prevent chaffing of the harness
also its is so clean and non evasive that no 1 will see your amp. (and try to steel it)

P.S. THOSE PLASTIC CLIPS FILL WITH DIRT so wash them and spray them with w-d40 befor pulling the centers out of them. or figure about 30 cents each new from the dealer.