Face Flexes not working on model?

Hello.

Im not sure whether this belongs in the Garrysmod Discussion or the Models/Skins section, so I put it here. If this belongs somewhere else, could a moderator move it?

So, I decided to download a model pack from TnB, Taco 'N Banana. I replaced all of their physics with the Enhanced Citizens ones, but I’ve come across a terrible problem.

Many of them don’t have any face flexes.

I plan on using these models for a comic, but without facial expressions, it would be very difficult to do.

So how would I be able to add facial expressions, controlled via Face Poser, onto these models? I am still illiterate on this subject, so im not sure what to do and if “Face flexes” is even the right term to use.

Please help.

http://www.facepunch.com/threads/712714-VTA-import-now-working-(indirectly-but-it-works!)

Thats about all you need to know, well all I used to learn

Thanks!