Need help with IP change on domain controller

Hello,

We have a situation that we need help with.

We have an office where we have to change the IP address on every machine to a completely new IP address scheme. The office currently has two Windows 2000 domain controllers running Active Directory, DHCP and DNS on each machine and the IP address on these two machines must change as well. Note that there are other Windows 2000 domain controllers in other offices located in other states who are set up with Active Directory, DHCP and DNS that will stay "AS IS". All of these active directory domain controllers "talk" to each other and the zones on these servers are all active directory integrated.

I am concerned that we don't know all the steps needed to change the IP addresses on the two domain controllers and get everything working correctly in the office much less getting all the domain controllers in all offices
"talking" to each other after the IP address change.

If anyone can provide us with any information about how to correctly change the IP addresses on these two domain controllers we would very much appreciate the help.

Thanks,