rhino is a nurbs modeller and works with mesh objects only to help with stl production. This is actually a nice feature, but will not help with what you want to do.

If you cannot get the original model in igs then import to maya, and render vector images; then save this image in illustrator format. From .ai you can export to whatever cad software you use. Perhaps max can also do this, i don't know.

good luck, you can do it

From rhino you can 'create 2d line drawing', then export the selected line drawing (it outputs it into the same file, you'll see it when you zoom out) to illustrator.
Did that help? That might not be what you were after.
I use this feature a lot, and sometimes do my material fills in photoshop to get a different effect than putting materials on in rhino and rendering in flamingo, or exporting to Max and using materials/rendering there.

As was stated above, Rhino is primarily a nurbs modeler and it just doesn't make much sense to do heavy modelling in meshes in rhino. The beta of version 4 has a few more tools for meshes (boolean operations) but still they are not up to the level of other software.

However, one option may be to use the MeshToNurbs command within rhino. This will convert all meshs to nurbs, i.e. all triangular or quad faces will become trimmed nurbs surfaces. You can then use the MergeAllFaces command to try and reduce the complex of the model. This will merge faces that are coplaner. Onve it is back in nurbs you will be able to do the make2d command.

But overall, I agree with Simon above and to just use another software.

in addition to what andrew said:

if the model is too complicated, when you try to do meshtonurb, it will error out after a long time due to hitting the windows 2GB application memory limit (don't ask).

you can get around this by doing it in smaller chunks - convert each layer separately, for example (if the objects are split up by layers)

also keep in mind that the meshtonurb command can take a few minutes to crunch, even on fast computers.

yeah manamana i learned that the hard way. i converted each mesh separately, which worked, took a long time, but it worked. when i went to make2d on my new polysurfaces it took an hour for rhino to create the drawing. when it finally did i exported it to aCAD and the drawing had over 400,000 lines. oh boy.
but everything worked. thanks to everyone for your help.