Hi and welcome to PC Help Forum !!
Are you familiar with Windows XP group policy settings?
I am going to tell you now how to set the homepage for all users of the PC.
Log in as local admin.
Click start > run > type gpedit.msc > under "user configuration" click and expand "Windows Settings" > Expand "Internet Explorer Maintenance" > click on "URL's" > double-click on "Important URLS's" in the right-hand pane > it should all be fairly straight forward from here.
Let us know if you need any more help.
