A quick check of the Animation Master forum shows this question about MoI nurbs was asked in 2010.
It gives a Rhino link regarding this question. But it talks about wireframes and DXF, also N-gons.

http://zandoria.wordpress.com/tutorials/rhino-to-am-tutorial/

http://www.hash.com/forums/index.php?showtopic=37284&hl=nurbs

- Brian