Just so we're clear.
Although we have an SBS server, we also have a full blown Exchange 2003 server. So we do not use the SBS 2003 email function, we use the actual Exchange 2003.
I need to introduce a new DC into the domain running Windows Server 2008, and demote the SBS Server.
Is it just that simple? Or is there more to it? FSMO roles? Etc? Files and printers have already been migrated from the SBS 2003 server. So really it's just acting as a DC for now. My Windows Server 2008 box is ready to be DCPROMO and take over, but I wanted to ensure there wasn't something else I was missing.