I would love to be able to specify schematics to go into other dimensions, not Overworld. So for example, the Lost Worlds mod adds a dimension that's all about modern cities, and so I want to have modern building schematics spawning in that dimension, but the Twilight Forest dimension is all about fantastic and faery things, so would like to put those kind of schematics in that world. Under your existing system, could be done by having the folder named as a number which = the dimension id.