Change the InPrivateBrowsing Homepage in Internet Explorer 8
One way to change the homepage from the default about:InPrivate page is to edit the Registry:
Change the value of InPrivate from res://ieframe.dll/inprivate.htm to whatever Web site you want. Make sure it’s the full URL, including the http://.
Eric Geier is an author of many wireless networking and computing books including Home Networking All-in-One Desk Reference For Dummies (Wiley 2008) and 100 Things You Need to Know about Upgrading to Windows Vista (Que 2007).