Zombie Survival Infection

In the new version of Zombie Survival, when a zombie in multiplayer has killed/infected another player, the player revives as a zombie but with the same playermodel (E.G Combine Elite) and it uses the same Classic Zombie animations and the claws. Is there any way to make it so that the zombie npcs do the same to human npcs in singleplayer and once the npc is a zombie they attack any other human npc, like for example a classic zombie npc kills Alyx npc, Alyx revives as a zombie using the Classic Zombie animations. Remember though, on ALL the human npcs (Barney, Magnusson, Alyx, Mossman, Odessa, Gman, The Combine Soldiers etc)