In MediaWiki, you'd type the name of a page, then click "Go" (as opposed to just submitting the search form and searching) -- if that page didn't exist, it'd give you the option of creating that page.
to create new pages u will have to add them as links...this can be done by writing the name of your new page within 
eg: i want to create 'n page' ill write [n page], and then save.
this will appear as: n page? when u click on the '?' it will lead u to a blank page where you can write your new text.
hope that was of some help!
if your'e familiar to mediawiki you shoauld try dfwiki wich uses the same