Mr. Zort: The basic answer is for you to set up the plane as if it were a mono plane. Since you are flying in Basic this coming year all you have to do is set er' up to fly the geometry of the manuever. On the IMAC web site is Peter Goldsmith's trimming guide for any plane (bi-plane or mono-plane). I'll not going to repeat it here since it's several pages of information on how to set up a plane to fly IMAC. I'd print that puppy out and take it to the field. Just a note about the trimming guide, it's designed to follow it by the numbers. Please don't do step 4 until you have completed steps 1, 2, and 3 IN THAT ORDER. It really does matter.
The biggest learning curve that new IMAC pilots go through is trimming a plane out to fly good. This stuff is about 4 times easier to do with a well trimmed out plane. Don't be satisfied with your thrust until the plane is going straight up "hands off". Keep spending the time adding washers for L, R, U, and Down thrust until she tracks good on the upline. Also set up the transmitter so that it takes full stick deflection of the gimbles to fly the sequence. Most new pilots only move the gimbles 1/4" L, R, U, or Down to fly the plane. This in incorrect. You should move the rudder gimble "hard over" while flying, move the airleron gimble "hard over" to do the rolls, move the elevator gimble "into your belly button" to pull out of your hammers and humpties. With these gimble movements coupled with these throws, your Ultimate will be a SMOOTH flyer and not a plane that is "all over the sky" trying to keep er' straight.
Any spacific questions, just ask. I've been flying in the Unlimited Class for over 8 years, and have had several bi-planes, all Ultimates.