Adding www prefix for multi-portal DNN installations in IIS7

DotNetNuke is a well established open source, content management system (CMS). The platform allows users to develop multiple portals with different domain aliases using a single installation. Depending on your host though, you may have issues with URL cannonicalization. In plain English, this means that users that browse to your site with http://falconwebtech.com are redirected with a permanent 301 redirect to http://www.falconwebtech.com. It doesn't really matter which one you use, but to avoid duplicate content and enhance your sites' SEO rankings, pick one and follow the instructions below to setup the redirect on Windows IIS7.