ReNeGaDe

I thought that might not make sense, sorry about that.

You give permissions(posting rights etc) to users in the admin cp of the forums. I don't allow guest posting, but I allow guests to view some of the forums (not all). If a guest tries to post, they get a message saying something along the lines that they don't have permission or only registerd users can post and they can register here.

In that case, wouldn't you have to change the link that is displayed to take you back to the Nuke login? Or make the forum module only accessible to registered viewers? Otherwise you are still going to end up with people registering on the phpbb side instead of the nuke side.