I see, well thats a shame, there is absolutely any other way to do this, what I want to add its a mod that makes exploring your world something useful besides new types of woods, here's the thing, I want to change the lenght of the day to something better for gameplay lets say 1 hour day 45 min night, also I want to change the ore gen so ores became biome dependant, and finally add enviromental conditions (rain makes you slow, snow makes you cold, desserts makes you dehydrated and so on) and I just can not find how to do this without overriding the overworld entirely, so if any one has some idea that would be cool, yet I think I will try to use ForgeGradle to check if Im not killing nothing important on other mods :P