Perhaps http://www.mediawiki.org/wiki/Extension:Boilerplate would be more suitable for this problem.
~Daniel Friesen(Dantman) of The Gaiapedia, Wikia Graphical Entertainment Project, and Wiki-Tools.com
Frederik Dohr wrote:
Is there a way to put default text on every page so that every time someone creates an article, the default text will already be in the article?
http://www.mediawiki.org/wiki/Extension:CreateBox
HTH.
-- F.