This was an old mod, and it recently was continued. Wedge was inspired by it; it has tons more options than Wedge, options extending even into custom tree generation.
The plus's of this mod over Wedge are more options and also that the settings are saved per world in a config file. Unfortunately, Wedge also succeeds where this does not; it has no world preview, and (I believe) no in-game GUI, only allowing you to set generation via editing a world's config file.
Does someone want to use this mod and tell me if the benefits outweigh the risks?