Set program access and defaults
Windows 2000/XP’s “Set program access and defaults” appears to treat the defaults as identical for all users, and doesn’t allow non-Admin users to change it. So while it’s happy that I use Outlook 2003 for my email, I can’t convince it that when my kids logon to the same machine, they’ll use the simpler Outlook Express.
This little utility should do the trick
I think the anti-spam defences chopped the URL. It’s here: http://windowsxp.mvps.org/defaultmail.htm