For a newbie, I think webmin & phpMyAdmin are best for getting things setup. When you setup Webmin in Mandrake, it defaults to using
https://yourhost:10000 as the URL. Webmin is included with the Mandrake CDs. The wizards in KDE/Gnome are okay to get a super basic server running. You say your apache service is running?.. Try opening a browser and point it to
http://yourhostname or IP of the mandrake box. You should see your Advanced Extranet Server default webpage come up. The default location of all the web files in Mandrake is: /var/www/html
If you prefer working through the console to manage Apache, the configuration files are in /etc/httpd/conf .
Good Luck