Forum:Does each wiki have its own files, making it possible to add extensions and customizations?

I was looking at the full URLs, and it appears that the MediaWiki files are in the domain root.


 * http://world-war-2.wikia.com/index.php?title=German_Aircraft

I'm not sure that's an indicator or not, but I'm wondering if the wiki has its own files so it can be customized. I'm wondering about things like extra namespaces and namespace protection. --Sascha 22:27, February 3, 2012 (UTC)
 * These can be done through Special:Contact. 22:33, February 3, 2012 (UTC)