NameVirtualHost 71.55.161.118:80

<VirtualHost 71.55.161.118:80>
    DocumentRoot /var/www/htdocs
    ServerName cocse.org
</VirtualHost>

<VirtualHost 71.55.161.118:80>
    DocumentRoot /var/www/htdocs/mdk
    ServerName wardriver.info
    RewriteEngine On
    RewriteRule ^(/mdk/.*) /var/www/htdocs/mdk$1
</VirtualHost>

# or change these lines to *:80.  depends on how many ips you have