Hi ghan, there is a plug-in available here:
http://moi3d.com/forum/messages.php?webtag=MOI&msg=1519.12

which allows for creation of a helix that is following a circular path, but there isn't currently any tool that will create a helix following a generic space curve.

Rhino does have a tool for doing that, so it is easier to create that particular helix curve in Rhino and then bring that curve into MoI.


If you would like to post your path curve that the helix should go around, I could create it for you in Rhino and send it back to you if that would help.

- Michael