My friend had one back in the early 80s, cool car. After you dissect it into parts, can't you group the parts, or export all the parts at once. That should import it into Bryce assembled as a group. I'm not familiar with Rhino, but the nurb modeler I use ( Electric Image ) allows you to cut-up parts and unhook faces. As long as the parts are all exported in the same file, they come into Bryce as a group assembled correctly.

Stephen Ray