So I've got a few creepyish Thalmorish baddies in a thing I'm doing.

Now, the point was that they're kind of warped. Giant heads, long arms, and I achieved this by modifying the bones of the default skeleton.nif that NPCs use.

Pic here.

http://i.imgur.com/R5tIbgA.png

I've noticed however, that animations reset most of my changes. Bone-scaling changes stay, but any movement or elongation of said bones seems to reset.

Is there something i'm missing here? How can I avoid this and get my weirdo Thalmor back?