Thread:Project:Support desk/Creating a wiki in a sub directory of another wiki

I currently have a wiki at en.sturmkrieg.com and a wiki at en40k.sturmkrieg.com. I would like to add the 40k canon wiki to the EN subdomain, rather than having a whole separate one that is combined with "40k". What I would like to do is add en40k.sturmkrieg.com to en.sturmkrieg.com/40k/. I remember seeing something about modifying .htaccess to make certain addresses not count as wiki page titles so that non wiki pages can be accessed using the same address as the wiki. What do I need to add to .htaccess so that I can have a wiki at en.sturmkrieg.com/40k/ without the computer thinking that the URLs are page titles for en.sturmkrieg.com?