Looking for a mod that is easy to use for creating an alternate Overworld and alternate Nether for 1.7.10.
My reasons are my own. I need to confine a certain mod's mobs to these two worlds. Going to put a server together and players want encountering these monsters to be something we seek out optionally, like a hunting ground kind of world.
Pondered using MCreator due to the simplicity of the needed task (and I don't really care what the public consensus is, if you don't approve, keep it to yourself, I saw far too much toxic behavior and elitism ranting about why it's "bad" and will instantly block people who behave as such).
So on target about the question. Any good simple 1.7.10 mods that generate the requested alternate worlds?
Thanks in advance.
On a side note: While I have BOP I would like the Alternate Overworld and Alternate Nether (and End if we can get one) to have only vanilla biomes.