What are your mesh objects? It may be possible to model them directly in nurbs. If you have to match the mesh model closely then these are some options: Geomagic and RapidForm both have semi-automated tools to convert meshes to nurbs; however, both programs are close to $15,000 dollars. A much more affordable solution uses a nurbs modeling app (such as Rhino, FormZ, Amapi, VectorWorks, to name a few) to make a series of sections through your mesh model and then tracing the sections to create nurbs contours. Then the contours can be lofted (or skinned) to create a nurbs surface. Rhino has a plugin called Smurf that assists in the creation of the contours. Chris