Thank you for the reply.
I think I need to provide a little bit more information.
Basically, I have 5 forums which are already running. The problem is I want to add another but, don't want it to go live straight away because I need to add some (quite a lot of) topics first. When I go into the admin panel and add another forum - it of course goes live straight away.
Is there any work around? Maybe changing some code so that the forum I want to edit before going live will not display in the "public" list of forums.