A simple but really cool mod, I know we have others, but this one with monsters, Mob Horse is a more standard game... I miss a dog to tame, and an easier way to command, like sit and follow, and others
animals, like in the desert, a camel, and savanna, an elephant, I don't know.. But thanks for the mod and the work :)
There is a bunch of mobs mods which work with this one, like dmobs, you might find what you need in the other mods.
Also editing these mods is easy so you can easily take only the mobs you want from that mods...