I have the kit mentioned in the above reply "Ultimate Camping Mod"
Here is a video of it installed:
YouTube
Comes with window controls, lock controls (same switch) and a button to pop the trunk. Seller is a great guy to do business with. The instructions are listed in that thread including the wiring diagrams from Toyota, but I suggest buying his kit and following his instructions. Takes 3 hours tops.
I just installed it last weekend. Very worth it for car camping!