This is a pretty broad, open ended road type of question, but a lot depends
on if there are other existing win2k dc's in the domain already or if this
is the only one. If the only one, then you're basically going to need to
rebuild everything from scratch.
If there are others, when this machine is demoted (if it will demote) then
it should pass on any fsmo roles it has to the other dc/s automatically.
You'll need to install and/or configure dns on another server and point
everybody to that machine if this box was the only dns server there.
Licensing should already be replicated to another dc, but you'll also need
to install dhcp on another server and then set up your scopes again like you
have them now on this box.
some articles that may help depending on your situation and needs;
255690 HOW TO: View and Transfer FSMO Roles in the Graphical User Interface
http://support.microsoft.com/?id=255690
if fsmo don't move or can't move them;
255504 Using Ntdsutil.exe to Seize or Transfer FSMO Roles to a Domain
Controller
http://support.microsoft.com/?id=255504
if machine won't demote on its own;
332199 Using the DCPROMO /FORCEREMOVAL Command to Force the Demotion of
Active
http://support.microsoft.com/?id=332199
removing metadata of old dc that would not demote gracefully and was forced;
216498 HOW TO: Remove Data in Active Directory After an Unsuccessful Domain
http://support.microsoft.com/?id=216498
--
David Brandt
Microsoft Corporation
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