I'm having the same problem that Krokx is having. I cannot get this mod to work. I load the map, John dissapears, the screen then freezes and then crashes to desktop. I have Rampage trainer and Wardrobe editor.
You know how all the trainers give you the ability to spawn peds? I was looking for something that could spawn horses, but in a wild, untamed state so the player has to tame the horse themselves, kinda like the horse breaking side quests in RDR1.