Add config option for world type

[microjunk]

Couldnt think of a better way to say it in the title.....

 

What I am trying to do is add an option in the config so the player can change the biome in the config option for my custom world type. I would like it so that it will allow for any biome from MC or my custom biomes or a biome from any mod, but if it is only possible to add the option for my biomes that would be fine too. Does anyone have any idea how I would set this up?

 

Thanks in advance.

[RANKSHANK]

well biomes are ID'd and saved with the chunk data, So manipulating how chunks generate is just done by changing the set variable in your custom world generator, basically make them input a byte or array of bytes and restrict biome generation to these values if a biome with that Id exists