See Chapter 3. Getting Started for an introduction with examples of how to create new BCS setups.
If you want to add an existing geometry object as a new target to the BCS, follow these steps:
Creating one weight with a dataPoint to open the jaw has the advantage, that this allows you to comfortably sculpt the combinations with the opened mouth without worrying about integrating joint deformations into the shapes.
Renaming dataPoints works the same way: you select the dataPoint and enter the new name in the Data Point Settings box.
The left-right separation is done when a weight is set to bilateral. All dataPoints that use weightPositions of a bilateral weight are bilateral. To make a weight bilateral, select it in the weight list and activate the Bilateral box in the Weight Settings part of the BCS GUI.
For more information see 5.7 The Automatic Left-Right Separation.
You now have created a new inbetween dataPoint. Geometry to edit the dataPoint has also been created, so that you can start right away and model the inbetween.
If you want to know more about weightPositions, inbetweens, interpolations, etc., see 5.3 Inbetween Basics: WeightPositions and the following pages.