Thanks for the reply. In fact, it's not too far removed in some ways from Diplomacy, except amped up on steroids in terms of the "rules" and the details involved. I realise now, what I wrote wasn't the clearest and could be taken to mean I want to tailor the forum to individual users.
Let me give more explanation of what it is I *think* I'm trying to do.
I want a forum, which would have permission groups like any normal forum, giving users access to specific fora and topics etc. Nothing ground breaking there. However, in the same way as the header above this forum has various non forum pages, I want to display game pages, so an orders page, or a messages page, which would not be related to the forum operation in any way, except that the user would have used the forum login to gain access to the site, and from the UID of the user, I'd pick up what character he was playing and so on. All the game code would essentially be external to the forum, I simply want to use the forum to authenticate users and link to the game code. Obviously I'd need some forum code per page rendered, to track session etc but I believe that's possible from what I have seen elsewhere?
Does that make it clearer? Or just more opaque:?