tworavens, I ran the wiring for the door popper (and my CB) behind the interior trim panels. There is a good bit of room behind them so I just snaked the wire back there then hid the wire under the door sill (where the factory wires run) to the front of the VX. In some cases the interior trim in the back doesn't really touch the floor so you can just tuck the wires under the trim without having to remove anything.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless