About vBulletin
 

Are all sites supported by vBulletin i.e. Zelaron in the same format as here? Another question, are the commands the same here as those as well? Thanks in advance for your answers.

Basically its fully customizable.

I suggest you check the default community forum out at http://www.vbulletin.com. That's pretty much what you start out with when you use vBulletin version 3+. Zelaron's Synthesis theme has been customized entirely from the default layout of vBulletin 2, which in turn had to be remade once again for vBulletin 3. It's a lot of work to make a theme like this one.