I assume you have XP so the following will be how you do this. Click start, run, type mmc in the box, hit enter. If you don't have a .msc file already, you will have to select add/remove snap in and add the snap ins for group policy. Then go to user configuration and find internet explorer maintenance. Under the URL's tab you can add your page URL and save it. Then you can distribute this GPO over your network.