We're running Apache 2, so I've found mod_sspi. A few more tweaks need to be made so everything is configured correctlyl, but I'm fairly confident this will work fine.
My problem now is getting the CGI script to run as the logged in user. On an NT box, under which user will the script run? If it is not as the logged in user, how would I go about changing this? I've seen many options for Unix, but Windows is a different beast.
Thanks for your suggestions.