Good morning Bill,
Sure, if people have XP on their computers then they have no choice -- in
the USA at least -- but to have IE6 and O/E on their computers (whether or
not they choose to use either of these apps.)
Historically, O/E been more or less independent of the O/S, and has been the
"companion" of IE. O/E was found/used on many other Operating Systems, going
back to WIN 95.
From what you're saying, with the advent of Vista, it sounds as if IE7 and
Outlook Express have finally gotten a divorce.
Alan