Very nice tut.Where did you get your resources to write this?
On the job experience. No references were used. Forensics (applied to computers) is a relatively new field and there are no real standards at the moment. One book may tell you that their way is the best while others will tell you the opposite.

That said, there are several organizations out there that are working on standards and best practices. Here is a good starting point for you:

http://www.cftt.nist.gov/

--TH13