This not the website default page that is resolved when entering just the domain name.
I'm refering to a default page for a 'nonsense' address such as 'someDomain.com/anything' so there's no directory with some valid file name.
I don't see where/how to this is handled in IIS. I have a IIS 6.0 website on godaddy and when I enter a nonsense address it resolves to a page other than the default website page.