GOOGLE SKETCHUP 3D BASECAMP, MOUNTAIN VIEW, CALIFORNIA--I'm still in the geomodeling session. There is a pointer to a useful tutorial and a script written by a SketchUp enthusiast on how to flatten 3D objects onto 2D planes. You can see it, and download the Ruby script, at
http://sketchuptips.blogspot.com/2007/08/plugin-unfoldrb.html.
--RSN