Moving a Global Catalog

In Windows 2000, there are no PDCs and BDCs. The Global Catalog Server could be viewed as a sort of PDC if set up with PDC Emulation in Mixed Mode, however, which is probably how you have set it up. To move the Global Catalog you just need to enablethe Global Catolg on the new server through AD Sites and Services, then disable (un-check) the Global Catalog option on the old server, but it seems from the wording of your problem that you are already in the know for that step.
Essentially, once you move the Global Catalog to the other server, then you need to change the status of the new server to PDC Emulation.
This article can help understanding the role of the PDC emulator: http://www.microsoft.com/technet/treeview/default.asp?url=/TechNet/prodtechnol/windows2000serv/evaluate/featfunc/05w2kadb.asp

Anyway, essentially by default the first Windows 2000 Server on the network is the GC and PDC Emulator in a mixed mode network. But MS claims you can move these roles to other DCs, andsure enough, as you know, moving the GC is easy.

To answer your question: All you need to do other than move the GC is make the new server the PDC emulator, and you will probably have to bring down the old server before you do this in case of conflicts.

Here is the document you will need to change the PDC Emulator:
http://www.microsoft.com/technet/treeview/default.asp?url=/TechNet/prodtechnol/windows2000serv/deploy/confeat/06w2kadc.asp

In Windows 2000, there are no PDCs and BDCs. The Global Catalog Server could be viewed as a sort of PDC if set up with PDC Emulation in Mixed Mode, however, which is probably how you have set it up. To move the Global Catalog you just need to enablethe Global Catolg on the new server through AD Sites and Services, then disable (un-check) the Global Catalog option on the old server, but it seems from the wording of your problem that you are already in the know for that step.
Essentially, onceyou move the Global Catalog to the other server, then you need to change the status of the new server to PDC Emulation.
This article can help understanding the role of the PDC emulator: http://www.microsoft.com/technet/treeview/default.asp?url=/T echNet/prodtechnol/windows2000serv/evaluate/featfunc/05w2kad b.asp

Anyway, essentially by default the first Windows 2000 Server on the network is the GC and PDC Emulator in a mixed mode network. But MS claims you can move these roles to other DCs, and sure enough, as you know, moving the GC is easy.

To answer your question: All you need to do other than move the GC is make the new server the PDC emulator, and you will probably have to bring down the old server before you do this in case of conflicts.

Here is the document you will need to change the PDC Emulator:
http://www.microsoft.com/technet/treeview/default.asp?ur l=/TechNet/prodtechnol/windows2000serv/deploy/confeat/06w2ka dc.asp