Installation:
.Download Menyoo here: https://www.gta5-mods.com/scripts/menyoo-pc-sp 
.Install Script Hook, Script Hook Dot Net and Menyoo 
.Extract menyooStuff to your GTA V directory 
.Start the game, press F8 twice to open Menyoo and load the mod at object spooner/Manage saved files section. 

And you NEED to install these models using Addonpeds. DO NOT CHANGE THE FILES NAMES.
https://www.gta5-mods.com/player/halloween-pack
https://www.gta5-mods.com/player/the-tall-man-add-on-ped
https://www.gta5-mods.com/player/frankenstein-add-on-ped
https://www.gta5-mods.com/player/pinhead-add-on-ped