How do you properly install the NPC Animations addon?

I have tried making new folders and putting them in there, I tried making new text file documents and others but they don’t work, I still get the ‘unknown command’ label and now I am running out. I posted this in the video section because I thought it would be appropriate as alot of people here managed to make movies using it.
The addon I am talking about is in this thread:
http://www.facepunch.com/showthread.php?t=353858&highlight=npc+animations

Can I please get some help? I see alot of movies in gmod using this script, I want to know how yo properly download this so please can I have some help?

wrong section broseph… http://www.facepunch.com/forumdisplay.php?f=65

Guess you have never installed something that isn’t in addon format.

Yeah…

This isn’t in addon format, link me the one that is please.

Give me some real advice please.
I need some advice on this, I tried typing in the codes that are in the tutorial in the link but the players always run around with the T-shape pose.