I am completely confused. What does that thread have to do with anything?
You can already see things on your system if you go to Terminal. You SHOULD NOT BE changing things so that hidden files show up in the Finder. Those files are hidden for a very good reason: If you modify them, there is a good chance your system will behave in unexpected ways.
The .Spotlight-VT100 directory contains the Spotlight database and all of its associated metadata. If you want to clean that out, simply go to the Spotlight system preference, add your hard drive to the "privacy" section, and then remove it. But by all means, do not change it so it's visible in Finder. The same goes for .DocumentRevision-VT100, which is the database for the "Versions" functionality that was introduced with Lion.
OS X is a large and complicated operating system. There are bound to be some issues that show up for some people in some circumstances. There are way easier ways of addressing them than making their databases show up in Finder.
My advice: DO NOT search for some of the things you're seeing, and then start trying things in every loosely related thread you see. It's making a mess.