Want to replace a Windows 2003 domain controller with a Windows 2008 domain controller of same name and IP.

But WHY?  Why keep the name and IP?  Isn't your network designed properly?  If so, it doesn't matter, a minute or two updating a script or two and/or a group policy and you don't need to keep them name and IP.  

And if the network isn't designed right, why not take the time to change it NOW?

Lol, lots of assumptions flying here, sir!  :)  I WAS looking to keep the same because i was concerned about many of our users here having to relink their excel documents to a new file path, but it turns out the links use the mapped drive letter of the server rather than the UNC.  So looks like the server names do not have to be the same after all.

Just out of curiousity, what lead you to believe the network wasn't properly designed?  Do people usually keep the same name and IP to paper over some deeper AD/network issues?  Thanks Leew.