Survivior NPCs

Can someone make the Surviviors replace 4 of the citizens?

Been asked for before, i think.

I think its not possible, the survivors bones are different to the ones GMod uses.

Assuming you mean the Left 4 Dead survivors? You didnt specify a game.

well if he/she means the l4d survivors can there bones be re riged to work as a npc?

I think some one has tried that, the results were not particularly pretty.

Broken animations and all that?

Well, the models lacked necks, and theyre arms were all stretched out.