Cutting nurbs
 

Hello guys, while working on my Porsche i ran into a problem. How do i cut a nurbs object in half? Like detatch some part of a nurbs object? I just try to copy the object and delete some part but the whole thing disappears. Whats the right way to do this?
http://timur04.20fr.com/screen.jpg

Select an isoparm you wish to detach, Edit Nurbs > Detach Surface.

Project a curve to the surface, and use the curve to detatch surface. I may remember wrong but I think this is it.

that would be using the Trim tool... depending on the situation of course, but generally, in my experience, trimmed surfaces aren't really a good thing. :P It could be ok for a car, though, depending on where you used them.