Thanks for your reply.
The best format would be AutoCAD DWG, or DXF preferably in version 14
or 2000. I could also use version 2002 if I really had to. In addition
to AutoCAD, I also have access to Cobalt V6, and can import many
different file formats with that program, i.e., STL, 3D studio, Catia
V4, ACIS SAT, STEP, Rhino 3DM, ProE/Granite, and others.