You can use his, just need to buy some extra bulb sockets from the junkyard or where-ever. Then splice it reverse way to the existing bulb socket's wires. Then tape them together, or somehow attach it close to where the other one is mounted. The only hard one would be the reading ones above the rear view mirror.
Then find where all the wires lead to and splice in the switch. I'm assuming they will all meet around the fuse box near the passanger door. Only problem is if they are not all on the same fuse, might need more than one switch. Though, who doesn't want a row of toggle switches under their dash? ^^
EDIT:
IDK I think the diode-dynamic guy screwed me. Two of the LEDs were a different color blue, and one is already burnt out... in less than a week...