Adding a Secondary Site for WSUS and SCCM

We are running SCCM2007 with WSUS on one 2003 R2 SP2 server. We have
a second location that we are thinking about converting one of the
servers there (2003 R2 SP2) into a Secondary Site for SCCM2007 so that
if we want to push out Service Packs or Office the Bandwidth usage
between the two locations wont suffer as much. What is the best way
to configure a Secondary Site so that users at that location will not
only look to the Secondary Server for the SCCM Software Updates, but
also WSUS security patching, service packs, etc.... without having to
go back to the primary site server at the main campus location?
.

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