Thes are just an idea of how I did it. attempt at own risk. If you have questions feel free to ask. I might be able to explain better than I do hear.
The easy way to get the wire through there is, Back door first
1

eal the vapor barrier back or take it off(your preference)
2:reach in and grab the rubber bootand slide it down the wires to the inside of the door to get it some what straight.
3:take a long skinny flat head screw driver and fold the wire over the tip.
4:take some electical or masking tape and do one wrap to hold the wire in the screw driver.
5: slide it in the boot from the bottom of the boot and position the little hole at the top of the boot so the screw drive can come through.
6: grabthe wire and pull it of the driver.
7: now try to put the boot back in possition(it is a pain but after you do it once it gets easier)
Front doors: these are much harder
1

eal back or remove vapor barrier
2:I took out the front speakers by drilling out the rivets but you could just reach in from the opening further down the door.
3:there is a white clip holding all of the wires to the inside of the door just take a flat head driver and push it in from the door jam
4:slide the boot down the wires into the door(these are harder thats why you do the rear doors first to hone your skills)
5:fold wire over tip of screw driver and wrap with tape.
6 work the screw driver through the boot and grab wire
7: replace boot.
Sorry for the crappy write up but I am in a hurry Iwake up for work in 5.5 hours.
This sounds kind of hard but be patient and dont force anything.
After you get the power wire run to a switch you can put lighting just about any where on/in your door.
When I figure out how to post pics on here I will show all of my lighting and maybe do a DIY on some lighting