Does anyone know how to wire the fog lights/headlights to come on at the same time? This is for a C6...

I don't know about the 06 C-6 but the basic idea is to install a relay on the high beam head light circuit so that when the high beams are turned on the relay will provide power to the fog/driving lights. The actual power for the fog/driving lights comes off the battery. The relay is merely a second switch for the fog/driving light switch. This way when you cancel the high beams, the fog lights automatically turn off.