Setting IE first start Page?

I'm a student employee at a college and am trying to set the computers (Windows XP SP1a) up so that the start pages are directed to our homepage.

I know some of you are thinking stupid question just go to internet options, but here's my problem.

The computers are shared computers on a domain wheres users log on as users and I want the start page to automatically be our homepage without them having to set it themselves.

I have edited the HOSTS file to redirect them to out page but this seems pretty unreasonable. Another thing we could do is redirect them using our DNS servers but isn't there anthoner way. These are dell computers and the default start page is "http://education.dellnet.com"

I have scowored the registry and other forums and have yet to come up with a solution.