how can I separate "what's new?" feature, 2 vBulletin for same domain?

[RedFoxy]

Hi all!
I need 2 vBulletin installed for same domain, I need it because vBulletin haven't a feature to filter some section from the "what's new?" function but keeping it in the search engine, like in my forum http://www.softairmania.it/forum.php I've zone to sale used object, I want to remove it from the "What's new?" but still I want that my user can search in it using the search engine.

To solve that trouble, I thinked to install a new vBulletin (like under http://www.softairmania.it/usedsale/) but I want share some features from the main forum, like style, languages and other tables (maybe user too), there is a way to do it or must I do a new installation and copy every config/style from old vBulletin installation? Do I need a new licence?

Thanks

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solved