Hi Morten, also if you can describe what you need with enough detail so an equation could be written for the position of each point on your curve, it would then be possible to write a script command that would make the curve for you by generating a bunch of points for a control point curve.

That's how this sine wave plugin was done:
http://moi3d.com/forum/messages.php?webtag=MOI&msg=1519.38

- Michael