Apple has published a (brief) Knowledge Base document discussing the Archive and Install feature for upgrading to Jaguar. The document’s short on details; I think you’ll find my series of articles is more informative, particularly this one.
The one new bit of information is that you won’t find this option on the Mac OS X 10.2 Upgrade CD (presumably what you get through the Mac OS Up-To-Date program for $19.95), only on the full installer CD, either the retail box version or the CDs that come with a new Mac.