This is not actually a mod as such.
It is a game save with all worlds bulldozed and world names changed.
It is used to start totally new games so you can build a new game to your own liking.
This takes time and patience to do, as there is absolutely nothing in that new game, no builds of any kind and only one sim Not in world so the game will actually save.
As for similar things, you could start a fresh or new game the EA way then bulldoze every lot and delete every household except for a single sim. Bingo, your very own "custom" world to build and save.
Again, this will take time and patience.
Hope this clears your confusion and helps