Files get mixed up all the time and mods get replaced by others.
Zombie Walkers 3.0 should be loaded after More Feral Ghouls in your load order (though in future releases I'm hoping to make it so it won't matter). who emerges 210 years to the day and time after the Great War.
You can change the mode from the options menu in the launcher. The feral ghouls in the Fallout universe have always flirted with being zombies, but they never quite go the whole way there. The load order is in the pinned comment! Zombies wander in groups, follow noise, and eat their victims.A configuration holotape is included for additional features including Settlement Attacks, Player Infection, Spawn Replacements, and more.