Hi Zyax,
Yes, you can create scoliosis MOCAP model with the new thoracic spine model 
There is an example in MocapExamples\Plug-in-gait_FlexibleThorax, which you can start with.
We had a question, somehow related to this that you can read for start. You can find it here" AMMR4 beta Kinematic analysis failed". I have explained a little bit about the details there.
BR,
Hamed