Add curve that blends into plane

[project6]

Hi, I'm trying to convert to power nurbs but I lack one feature, hopefully there is a way to do this.

What I want is to add a curve that blends into a plane. This is very useful for many products, and can be seen on telephones, cars, etc.

The optimal workflow would be this:

1) Construction of a plane, or some other object
http://img524.imageshack.us/img524/8725/redplaneoz0.jpg

2) Add this type of curve, and be able to control how it blends into the plane. (marked with red)
http://img90.imageshack.us/img90/2149/redcurvesbz5.jpg

As you can see the curve is sharp and visible at first, then blends out to completely disappear/blend with the plane.

I'd be very happy if this is possible using power nurbs and, if so, an explanation of how to accomplish it.

Thanks in advance

[PiXeL_MoNKeY]

Standard Blend can do that. Check out the 3 part car tutorial, on techniques for splitting the mesh. This is shown when he is making the air intake in the section part of the tutorial. Another way done in some packages is trim/boolean a tube (lofted spline, etc) where you want the blend, get a gap, and then use standard blend tools to fill it.

-Eric