Interact with imported models

I just installed the demo and I'm trying to quickly create a small proof-of-concept.

I've managed to import a model. Now I need the player to interact with the model.

Need help with the following:
- define 'hot spots' on the model
- listen for click events on the 'hot spots'
- move or alter visibility of model nodes as necessary

I've been through the cfm here...
http://www.torquepowered.com/community/blogs/view/6853
and I don't see any relevant methods.

Is this possible? Or, am I missing something?

Thanks