Blizzard removed this animation some patch ago, can't remember wich patch it was, but I myself think it sucked hard because I really liked the "poison-proc-animation" and it made you know you poisoned the enemy and was useful in PvP since you dont have time to keep your eyes on their debuffs.
So the meaning of this thread is that I would like to request anyone with the right skills to make it possible to bring this pack using an .MPQ file like normal modelediting or however it works. Thanks in advance!