Brow setup
This short demo will talk about setting up the eye brows  on your character.
1. First place four joints on the face as shown in the image.

2. Add controls to these joints by following  mouth_control_1  tutorial steps 5-7

3. make the Inner brow joints children of the outer brow joints, by placing the _pos group of the in brow under the _ctrl of the outbrow.

4. Duplicate the box controller  UI  from the  mouth_control_1 tutorial and label it for the brows.

5. Weight the joints to the face by using "edit smoothskin>add influences"  and use the "lock influence" option
(remember to "unhold" weights on the newly added joints when painting weights)

5. Create Set Driven Keys on the brow box controller using the images below