There were three I didn't install on my nForce 2:
810847: February 2003, Cumulative Patch for Internet Explorer 6 Service Pack 1
Q329441: Critical Update
810565: Critical Update
On of those three was causing Outlook Express to generate an Error report when I put several images in a new e-mail and then rapidly put blank lines between each image...really strange, but the error could be reproduced EVERY single time I tried it, and the only way to fix it was to not install the Windows Updates (I figured that out after about 3 reinstallations of XP). I eventually narrowed it down to those three...that means two of them are probably fine, but at least one is the source of the problem. I'm placing my bet on the first one in the list.