The link you provided in your edit is for Vista but I think I may have found what you're looking for.
The folder is hidden so, click on the Start Orb and type (without quotes) "%appdata%" and hit enter.
It the resulting Explorer window navigate to Apple Computer/MobileSync/Backup.
I took a look inside mine and just saw a bunch of data files. I imagine the info you're looking for is in there somewhere. Hope this helps. EDIT
Yeah, it appears in the article you linked that the guy used a Mac to decrypt the binaries for the address book data. He said "ideally"
you'd use a Mac but didn't give any other alternative.