System administrators will almost always set the default home page for the browser to the corporate website or intranet when building a machine. This is just a small registry hack that will set the home page for IE6 or IE7.
You could probably use this in a logon script to set to home page on all users when they login to the network.
Here’s the registry hack. You’ll potentially want to change the home page listed.
Here’s a downloadable version: