It's actually IE6 SP1 - OE is part of Internet Explorer. Try
http://windowsupdate.microsoft.com - or look for IE6 SP1 on the downloads
page.
Note - this is a group to support Outlook from the Office group of programs.
Outlook Express is a part of Internet Explorer and is a quite different
program, despite its similar name..
You will probably get a faster and more expert answer if you post this to an
Outlook Express news group.
Try posting in one of these newsgroups:
microsoft.public.windows.inetexplorer.ie5.outlookexpress for OE 5.x
microsoft.public.windows.inetexplorer.ie55.outlookexpress for OE 5.5x
microsoft.public.windows.inetexplorer.ie6_outlookexpress for OE 6.x
microsoft.public.internet.outlookexpress.mac for OE for Macintosh
If those groups aren't carried on the news server that's carrying this group
try using msnews.microsoft.com (MS's public news server that's the source
for all the microsoft.public newsgroups).
If you're
accessing the Microsoft newsgroups through the MS Product Support
Services "Community Newsgroups" web interface, click
http://communities.microsoft.com/newsgroups/default.asp?icp=InternetExplorer
to get to the Internet Explorer groups, then click the plus sign next to
your version of IE to see the link to the Outlook Express group for that
version number.
A good website for information on OE is:
http://www.tomsterdam.com/