Finally got some pics of the switch install I did for the rear fog light. I followed the wiring DIY that shows you how to tap the appropriate wires at the BCM. Here's a link to that thread:
DIY: Rear Fog Light Wire Via BCM and Stock Wiring
For the momentary switch that is needed for this, I bought the switch below from Amazon.com. The switch has a built in LED that lights up the red ring around the switch.
Amazon.com: Oracle Lighting MSGQ16FR Red LED Momentary Flush Mount Switch: Automotive
The install is pretty easy. I'd say the hardest part is working near the BCM to tap the wires since it's a small tucked spot. Here are some pics.
