Noopy - I beleive the other posts are correct. You do need to wait until the "90 days". However, I like you wanted to set everything up for our next trip (Feb. 05) when I made my reservations. Since we're staying at AKL concereige on our upcommng trip a few days after I made our reservations I contacted the AKL conceraige to "set up" the PS I knew we were going to want on our trip.
I asked the concereige if they had to wait until the "90 days" to make the PS or could they put them into place now. She told me that she'd have to wait until the reservation windows opend up for my particular requests. She also told me that unless I wanted to make changes I did not have to worry about remembering these requests. Their system will prompt them to make the arrangments at the approprate time.
Even though or trip is still a ways away I'm glad to know I don't have to remeber the dates for making the PS's... it will just happen "automatically". Also, since I'll probably be out of the country when our "90 days" comes up I won't have to try to do all this while I'm "out of town" myself.