I had forgotten you can do this, I will be doing it myself later today (I HATE the separately-unlocking rear doors). I attached the instructions.
BTW am I the only one whose TC remotes seem to have a mind of their own? This thing locks and unlocks when it feels like it. I have to be standing really close, and often if I am standing at the rear of the van, it doesn't work at all, and I have to literally just put my arm around to the side of the van, and then it works!? Worst implementation of remote keyless entry I have ever used.