Win2k SP3 server installation order

I’m about to roll out SP3 over the Christmas lull. I have found documentation on the server install order for Exchange SP3 but can’t find anything on Win2k Server. Does the order in which you install it matter? I usually install on the domain controllers first but does it matter? I have multiple buildings in which to do the installs so I’d rather do one complete building then the next and so on. —Richj