Ok, I have made changes to these 3 files and I hope they work. I have added a subdivisionlevel in the mouse rig 10 file so keep that in mind. If you have any issues let me know.
What I ended up doing is I simply adjusted the cheek blendshapes to be larger and I made sure everything was working right in the mouse rig 10 file.
Mouse Rig 10:
https://docs.google.com/file/d/0B_IqaAragbK8VWJXTk1naUo1S2c/edit?usp=sharing
The blendshape master file has the cheeks enlarged.
blendshape master:
https://docs.google.com/file/d/0B_IqaAragbK8eVJxVy16SmlGQWM/edit?usp=sharing
When I checked the animation file with the updated mouse rig 10 reference there was a extra mesh due to the history from when I extracted the head
Animation file:
https://docs.google.com/file/d/0B_IqaAragbK8RFdEZFNFdi1GWlk/edit?usp=sharing
