That's what I am asking in the post above - if that is possible. I could try to call SPG..."I made a reservation, my friend/partner will be joining me and he's a Plat, can I add him to the resv to make sure we get his PLat benefits?"
Alternatively, someone PM'd me, to change my account to their address, Xfer the points to them, and then have them make the reservation under their name. Thoughts on that approach?