Looks like I wasn't subscribed to updates from this thread, so I didn't know there were any replies til now. I can't find the exact copy of the map from the video, but if I remember correctly I modified the "Torque Request Tables" in Cobb ATR.
At 0% pedal position requested torque was 0, I increased this a very small amount. The car idled slightly higher as I expected, but the increase was hardly noticeable.
