How to redirect domain controller address to another one without changing IP Helper

Hi All
Basically we have been told that our domain controller's address is going to change, we have many switches 200+ that have the current address as the IP Helper address. The topology is basically a core 6509 that goes out to approx 45 distribution switches 3560s that then have multiple access switches hanging off 3560s, 2950s and 2960s. There are also many workstations that have the domain controllers IP statically assigned.
My question is is there a way that this server can be decomisioned and replaced with a new one with a different IP without having to change all of the devices IP Helper address static DNS etc. but to just redirect requests for that address to another at a higher level? Like say the core receives requests for the old IP and redirects requests to the new address? We have tried suggesting they keep the same IP for the new server but it's not going to happen.
thanks

You can use NAT to do that. Be careful though because that is really a band-aid and not a resolution to the problem.
http://www.cisco.com/en/US/tech/tk648/tk361/tk438/tsd_technology_support_sub-protocol_home.html

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