I just installed a clean version of Moodle 2.1.1 on Server 2008 with MySQL, IIS 7 and PHP exactly how this tutorial says:
http://www.bfcnetworks.com/whitepapers/installing-moodle-2-on-windows-server-mysql-php-and-iis7/
The werid issues I am having now is when I attempt to access the server IP address from the outside world, it gives me this: