Change template of this script

I need to customize [wikimedia script][1]? (open source and well documented) to look something like this: <[login to view URL]> WikiHow is also powered by same wikimedia script, but they don't like to share their source code.... or template... which is why I am here. I am looking to match the design of the ARTICLE Section/Tab ONLY of Wikihow.com. Both article page and article posting style needs to look the same.? Also... the template that you change... needs to match theme of an already developed website (the url will be given to the chosen coder). Let me know if you have any questions... I am just a click away. Ricky