[Mediawiki-l] URL redirect

[Kemsley Eric]

Hello, I downloaded mediawiki today and installed it
and it works! Running on fedora core 6 and is located
in /var/www/html/wiki . But, I want the url to be
http://wiki.mysite.org as it is now it's
http://mysite.org/wiki

I know mod_rewrite is working as I have 3 sites on
this server and all are working fine.

DNS is set correctly

How do I do this with mediawiki? I don't see anything
in the LocalSettings.php to this.

Thanks,
Eric