How do I uninstall Internet Explorer 7 from Windows XP SP3 to change it to Internet Explorer 6?
I can't find a good resource for doing so.
Have you seen this Microsoft Support Article, which I think tells you exactly what you need to know?
Since you mention SP3, please note that there is an "important" point on there that states:
It points to another Article to assist with that particular issue.
Control Panel > Add/Remove Programs
Switch to Add/Remove Windows Components and uncheck the Internet Explorer checkbox and click NEXT and follow through.
This you can use to install or uninstall any Windows component, like Windows Messenger, IIS, printer & faxes, etc.
It's a standard drill*.
PS: to uninstall, it's fine to install. You will have to insert the Windows XP CD.