for all of you who want to add after market a/c to your trucks, here's one man's idea. i saw this at a farm near my house unfortunately it was too far fromthe public road to get a good picture with my cell phone, but you get the idea. it's a roof a/c from a bus or something ducted into the back sliding window of the truck with house ducting. and there were wires hanging off of it into the bed, looked like romex? wired into the truck? or maybe he carries a generator with him to keep it cool?