Patching MOSS 2007 and WSS 3.0 to Service Pack 1 (sp1)

Great resource/reference but assumes single server farm. When you have multiple servers, just make sure you do the Central Admin server first, stop when it tells you to, go to the other servers and run setup and stop at the same place, then go back to the first one and finish, then all the others.

Patching MOSS and WSS to SP1