Corporate Renaissance Group, the makers of Changer, ReFormatter, Reverser and a number of other GP solutions is giving a 25% discount for purchases made by 12/21/06. So if you want the discount, buy in the next couple of weeks and tell your partner to use promotion code HOHOHO.
Corporate Renaissance Group is Having a Sale
Archived post from 2006. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.