MyBB Community Forums

Well I currently have a Forum and soon I will be upgrading my site and adding some other webpages but how can I make my forum behave the same as MyBB.com's forum, if you look it doesn't go full screen how can I achieve this?

Well you can add pages to the MyBB forum and make that the index.php and make the current index.php to forums.php. For example the theme New Era is a MyBB CMS theme. All the pages are controlled by MyBB and can be edited in the ACP.

You could also just make HTML website and integrate the login.