For Windows 2000: Download and install the DHCPExim tool. Export/Import the DHCP Database config. Note: this tool is only supported on Windows 2000. Using this tool on Windows 2003 will generate an error.
To Import the data from a Windows 2000 Server to a Windows 2003 Server. From a command prompt: netsh dhcp server import c:\filename.txt all
To Import/Export to and from a Windows 2003 Server:
Command to Export DHCP Data – netsh dhcp server export C:\filename.txt all
Command to Import DHCP Data – netsh dhcp server import c:\filename.txt all