Thanks in advance.
If you back the course up, and restore it as a new course without user information, it should keep those settings.
You can also use the import facility in the Administration Block. It allows you to select the items to bring across from another course without having to do a backup/restore. It does not bring any of the students over though, only content.
Maybe I'm missing the option, but this only seems to bring over things from the courses main page. Topics and content, etc etc. I don't see an option anywhere to bring over things from the gradebook.