Networks

I'm new to supporting Windows in its various forms. I have a problem I'm trying to solve (KB971187) where the FixIt tool won't work because of the problem I'm having. (Nice loop, eh?)

The Fix It Myself section of the KB article goes beyond my current knowledge and understanding, but it's up to me to fix it. What books do you recommend for learning Windows Registry (and fast!)? Any good websites?

Is Windows Registry similar across all the Windows variants? My problem machine right now is running Windows Storage Server 2003.

My particular problems with KB971187 are:
1. What is a SID? What does it look like? How do I know I've got the right one for the problem I'm having?

2. What is a PatchSQUID? I can't seem to find a reference to this nomenclature anywhere else on the web.

Thank you for any advice you can offer!

(Edited for formatting issues)