short answer: don't even bother
i wish the good folks everywhere had this as the recommendation for attempting this upgrade process. basically, if you upgrade, you lose access to all of the older (netbios) systems. the target has to be active directory (of course) but running in native mode (w2k only!)
solution: rename old domain (if you really like the name) and set up active directory using your preferred name. recreate all users on active directory. go around and remove each pc from the old domain and add it to the new one.
don't forget to hack the registry so that your users get their old desktop back. (HKLM\Software\Microsoft\Windows NT\ProfileList or something) .. change the "ProfileImagePath" key to the proper directory for each user that needs their old stuff .. oh yeah, be sure and allow them to be local admin so they have permission to get their stuff !
in retrospect, this is what i was trying to do:
Microsoft # 325851
ADMT Tool
okay, my first time to do this and i am having fun with it.. turns out, active directory has to be configured on the destination domain (they missed this in the docs). I like configuring the IP properties before running DCPROMO. That way, it uses my settings instead of making up something nasty.
okay! guess what! stinkin' target has to be native Win2K domain. how stupid... now i'm removing the AD and trying another approach