Shapekey Driver Constraint Addon
This addon makes constraining shapekey driver to bones super easy.
- Install the addon in the user preferences.
- rightclick on property -> copy datapath
- select the meshobject, than select a bone in posemode
- open the operator search with space or press "W"
- type in "Driver Constraint" and run the operator
- Set the all values and apply
- Thats it, your property now can be driven by the bone
Here is a small video presentation: Youtube Video