@nmd(View Post) You mean when you are hosting a server? One way is to change the world's name in the config file, or you can just delete/move the folders are the world you already have
@nmd(View Post) The centre of the map is the block you were standing on when it was created, not at the point where it was first used, and not (necessarily) exactly the same location as the workbench it was crafted on.