Originally Posted by YK82Consultant

It's actually easier than it sounds. The Platinum MR reps I had each time didn't question it one bit and changed it right away for me. Each time, it went something like this:

me: Hi, I'd like to change my megabonus to different one
Rep: Sure, which one would you like?
me: The 20day/35k one please.
Rep: ok no problem, I'll add in the note right away.



Just as a note, the change isn't reflected on your online acct. Apparantly they just put a note in your account if you change megabonuses and add the difference later: Each megabonus, I had 10k pts automatically from the online 5stay/10k registration and when I completed the 20 nights, 25k was added manually by a rep. This also means that if I had not met the 20 nights, I would've still received the 10k points(provided I had 5 stays) since that portion is automatic in the system.
^