Upgrading to 2000 domain.

I have a NT4 domain that I want to upgrade to Windows 2000 domain.

I had a NT4 BDC that I took off the network and upgraded it to a PDC and then upgraded to W2K DC. Can I now plug it back it into my domain and add other W2K servers to the domain. Finally, take the NT4 PDC and rebuild it as a W2K server DC.

Thank you.