Tim,
Rob has it. The steering wheel puller is a simple piece of metal bar stock with one center hole and two slots flanking it. When you pull the horn button off (not sure exactly on the A-D series how this is done) it should reveal two threaded holes on either side of the central nut holding the wheel on. After removing this nut, two long bolts are threaded thru either slot in the puller, and fastened into the wheel. Then, a larger bolt is threaded thru the center puller hole, and tightened against the top of the center bolt in the wheel, and slowly pulls the wheel straight off.
I'm sure I've over-complicated this, but it's really not difficult. I agree - a wheel off center can be very annoying!
-Michael