Jeong-Seok Yang posts a quick little tutorial on using the Cinema 4D Xpresso Preset he has created based on rown’s POLY script for unfolding polygons. There is also a post from Jeong-Seok Yang on the matter that you can check out (and translate) here. Cinema 4D Preset Unfold Motion Ver. 1.0 & Tutorial.
You may also want to check out a previous post UNFOLDING OBJECTS IN CINEMA 4D USING XPRESSO where youmograph shows step by step at how to achieve an unfolding effect with some expressions and some simple controls.