Jm4362: I'm glad to see you're going to try polyphasic, and I hope it works well for you! If you're looking for helpful ideas you might check out micth's original thread on polyphasic sleep
(it's dormant now, but still useful). As to which adaptation method to use (gradual or "cold turkey"), my experience with gradual adjustment last summer was that it was slower but somewhat less painful. This was the method used by Claudio Stampi (technically, used by Stampi's test subject) when he was studying polyphasic sleep for his book Why We Nap
. There's a summary of the relavant chapter from that book a little ways down on this page
which might help you if you decide to use that method.
Good luck with it! I look forward to reading your sleep logs in December.