Facial animation (Att. Jawid) ;)

Hey everyone (and especially Jawid)

Ive begun to look into facial animation with clusters (in MotionBuilder) and my question is if anyone knows a good approach.

My problem is that I have no idea whether you can update the face you already have in MotionBuilder (attached to your character skeleton, but as a seperate mesh piece) with an updated cluster-rigged version without messing up your existing model in MotionBuilder?

/Dann