To see the hidden folders in Vista open Windows Explorer by Opening Documents, Computer or Whatever.
Then Press the ALT key on your Keyboard. You will see a menu appear like in Windows XP Click on Tools and select Folder Options. Go to the View Tab and like in Windows XP select Show Hidden files and folders under Hidden Files and Folders.
Click OK and you are done!
You have to be logged in with Administrator privledges in order to change any of those files. I would strongly suggest you leave them alone because you might wind up having to reinstall the operating system if you screw them up.