NT 4.0 DC & 2003 DC Replication

I need to maintain NT 4.0 DCs in a 2003 network. I created a 2003 DC from a previously synchronized NT 4.0 DC and set it up offline. There has been some new users and security  changes on the current network since I first synchronized. What is the best way to pickup the new info from the NT 4.0 DC once I put the 2003 DC online?
RickNetwork EngineerAsked:
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NJComputerNetworksCommented:
add a new Windows NT 4.0 BDC using new hardware

make this server a PDC using Server Manager

Run Windows 2003 Upgrade on the server.

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Windows Server 2003

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