zombies!

Hello, I attempted to fix the gamemod zombie-survival,
that can be found at garrysmod.org: http://www.garrysmod.org/downloads/?a=view&id=57568
As far I can see the problem is in animation.lua.
As I remember snice some gmod update, the way to use the animations has changed,
I’m not able to find the way to use it now.
So can you help me to find how the hook setplayeranimation is handled.
(or directly the way to fix zombie-survival :))