I have been trying to follow the mediawiki instructions on how to install mediawiki in the "/w" directory and create short URLs so that you end up with wiki URLs that look like this

http://example.com/wiki/[Article Name]

I have oxwall installed in the root and currently, Oxwall is returning "page not found" when you go to 

http://example.com/wiki

What do I need to put in the .htaccess files in the root directory and the /w directory to allow media wiki to work?

Please find my existing .htaccess files attached

Thanks!