A useful maxscript of mine for those of you dealing with morph target animation (whether it be keyframe of facial mocap). This script lets you turn part of your animtion on and off based on your naming convention you use. So if every mouth target starte with 'Mouth_' then simply put that into the mouth section and set the base name using the button above it. Do this for your 4 groups provided and you can turn section of your animation on and off making it easier to spot problems.
Isolating the sections of your facial animation can give you vital clues to why a certain area may not be looking right. Its a non distructive process and your animtoin is still there, simply turned off until you turn it back on again.
Feel free to poke around in the maxscript and adapt to your needs...although I canm promise you there is nothing revolutionary there lol. To run simply extract the ziup file and bang it into your scripts folder. The run as normal.