Simple Insurgency MOD. It will download directly from the server
The only thing, the ZOMBIEvxx.vpk must be located in the custom folder of the and it will over write all other mods from the workshop. so you cannot run any other workshop insurgency skins for this mod. All sounds for the insurgents are set to moans and groans.
Look for RUPERTZ ZOMBIES on the server list. The MOD will download automatically, but you will need to restart the game for the mod to start.