New releases: version 2 of the SMS 2003 SDK, and how to install XP SP2 with SMS
If the TLAs SMS, SDK, WMI, and MMC mean something to you, then version 2 of the software development kit for Systems Management Server could be in your future. It was released just last Thursday - grab it from here.
If on the other hand you just want to install XP SP2 onto a bunch of client desktops, and you've got either SMS 2.0 or SMS 2003, then make sure that knowledgebase article 842844 is in your future.
(TLA = Three Letter Acronym
SMS = Systems Management Server
SDK = Software Development Kit
WMI = Windows Management Instrumentation
MMC = Microsoft Management Console)