Creating Nurbs from non linear planes

 From:  airdog (ACOFFMAN)
In a previous post I asked if there was a way to make a nurb surface (flat plane). Now im stuck because I need to create a morphable and "squishable" nurbs surface which is non-linear so a good example would be an oval, a circle, or any shape created by using the freeform line tool. This program is so easy to get the hang of so Im trying to avoid having to use Max or Rhino. If anyone can help or give pointers I would appreciate it. Thank you much.