I am working on a rather large client that would like WSUS deployed. They have about 300 clients, multiple servers, etc. with the internet being fed from one location to all of the satellite offices either through an MPLS cloud, point to point T1, or wireless LAN. A majority of their machines are XP but they have some 2000 boxes, and a few 98's here and there. All we are concerned about updating are the XP boxes to get all of their security updates and yes SP3 installed (lets avoid any regular concerns about putting SP3 on any box as I have already brought those up to the client, however they want it). I can't find any real information on deploying WSUS within the environment as all of the technet articles are huge. Does anybody have a good step by step or guide to doing this deployment?