The two links dagr8tim gave are enough to help me (at least enough that I don't spend 10min tracing the wiring and come up with the same info myself.) Combine the info from those threads and you should be able to get things working.
The only thing that's going to cause me a hassle I think is the heater wiring, it's going to be fun snaking the extra wire into each door. I really want those to work, being in the northeast my mirrors tend to get covered with rain, frost, ice, and snow a lot.