I found this in a few different places around the 'net - hopefully it's helpful:

Set Your Browser to Open to a Page of Your Choice

Is there a site you always visit first when you browse the Web? Would you like it to be the first site you see when you start Internet Explorer? Just follow the steps below to change your home or "start" page.

• Navigate to the Web page you want to see when you start Internet Explorer.
• Click Tools on the menu bar, and then click Internet Options.
• In the Home page area, click Use Current.