This is a GREAT Microsoft document on how to deploy multiple servers and discusses the pro's and con's of such a deployment. This includes Branch Office scenarios and the use of domain controllers and DFS in these situations.
Information on this file can be found at http://www.microsoft.com/downloads/details.aspx?familyid=1165F2C9-7E08-4B43-92FE-BB965D17B3B4&displaylang=en
ttfn
David
(c)David Overton 2006-23