If you are interested in NC-Programming then I would wait for WF 3.0. PTC is redesigning the Pro/NC interface from the old menu driven system to the new dashboard system. I would definitely wait if NC-Programming is your focus.
ng,
You have to create a model descriptor or you could get the model descriptor of the model and change the path. Look up the following methods:
1. pfcModel.Model.GetDescr()
2. pfcModel.ModelDescriptor.SetPath()
3. pfcModel.Model.Backup()