word:

/http://www.microsoft.com/office/ork/xp/journ/Wrd1005a.htm

excel:

/http://www.microsoft.com/office/ork/xp/journ/Exc1003a.htm

localised versions:

/http://www.microsoft.com/office/ork/xp/appndx/appb00.htm (not available yet).

if you have done an admin update before, you can't update from MS's automatic update site. you have to use the admin update