No he wants the mapping changed so he can skin that part as well...
I've yet to find a real cockpit that has ads in that position though. Unless there's a camera that will show that part clearly there won't be any ads on it.
That's an internal part, so it'll be on the cockpit DDS rather than the skin. You could probably edit it, but that would put it on every car, not just yours.
For the most part I reckon it's probably a little pointless.