happy to see people using my addon!
I know I'm really lazy with the tutorials, but you know, I actually consider most tools self-explanatory, so there's not much to show anyway.
In the CurveToolsPanel, the ?-buttons should get you started.
A word of warning: Softimage still has SDK drawbacks, which prevent scripters from doing a really clean job. Most of all, Clusters cannot be changed by a Custom Operator, only by factory Operators. Old story...
Related to this problem is the fact that the MoveComponentTool when applied on top of the CurveTools can mess up the Curves, because it does something with the Clusters that are input to the Ops. So before using it - FreezeM!!
On my ToDo: InsertKnot (with U-parameter), and with that in place, some day soon RoundCorners will get finished.
SI 2013 is at the door... maybe at last we see some progress again here...