I've just installed wiki, but it uses urls like
this:
www.mysite.com/w/index.php?title=page_title
how do I do to make it work as
www.mysite.com/wiki/page_title?
There are a couple of ways to achieve this; the respective procedures
are described at
http://www.mediawiki.org/wiki/Manual:Short_URL
HTH.
-- F.