Wow, that's something I'd love to have back when I was installing Netware on student computers for network access. I had to add the machine to the isolated LAN, run scans on the drive, and then, if I was lucky, make sure the machine passed min. sys requirements and pass it on. This all was before Windows XP came out tho.
Anywho, here's another suggestion. Since you haven't used Outlook Express, use it once. Run it and create the user data file by giving it a bogus email address or something. Then the update might apply. I know I cannot synchronize my PPC with Outlook unless it's been run once. (Runonce). Might be helpful? I dunno..