Run the power wire down the drivers side, and the rest of the cables down the passenger side. Running the wires is pretty self explantatory, except for the power wire. The easiest way is to go through the wheel arch. You'll need to take the plastic piece in your wheel well off to do this. You'll run the wire from your battery down through the hole in your engine bay (you'll see it if you look. it's on the right side.), up over the wheel arch, through a rubber grommet (that you'll have to make a whole in with a knife or something). From there, it will come out through a whole right above your foot rest. After that, just run it through the plastic with the rest of your wires, back to your backseat, under the backseat, and voila.
NOTE: You do not have to remove your back seat or all that plastic around the back seat to do it. To get it to look that nice and neat, you do... But you can run it just fine without removing anything.
ALSO NOTE: I ran the power wire through my wheel arch without taking the wheel off at all. It was a pain in the ***, and I definately recommend you take the wheel off, but you don't HAVE to take the wheel off to do it.