Basically, to make things easier, I shall just link you to http://www.perfect-ending.com/ as it shows perfectly what I'm trying to portray. If you visit the different sub forums under 'The Sagas' for example, you will notice that the layout completely changes. For each sub forum, the user has the chance to go by a different user-name (whilst still logged on to the main account). Essentially, each sub forum is almost like a new site.

Now I was wondering if any of you could enlighten me on what exactly is at play here. I'm considering opening up my own board with the same feature. By this I mean, is it some sort of addon to the board, or does the basic vBulletin software have this feature. Does it require complex coding? Or what?

Any help is appreciated.

PS - Slight noobish question, but if I registered a domain, for example www.domain.net, would it be easy to intergrate this domain into the forums. By this I mean, this would be sole 'root' domain, by visiting www.domain.net, users wouldn't be redirected to the site. Also, the url would be across the site ie: www.domain.net/category/post234433 for example.