Does anyone know where the files for the advisors head animations are kept and in what format (the generals and agents too)?

I'm not satisfied with their useless head bobbing anims and would prefer to simply replace them with appropriate static portraits instead, much like found in NTW. I'm hoping to replace a fixed element in each frame with an image.

But to even begin that project, I have to know what they are made of.. and can't seem to identify the files.

Any clues?