I was told that the tiny versions aforementioned are stripped down versions of the operating system's i.e. no drivers etc., and they run super fast. Going to check YouTube for them now
You can download Windows 7 from Microsoft's website. It's not a beta, it's called something else which is one step up from a beta. I highly recommend the download. I just got the new 1 TB Caviar green hard drive, and loaded it on it. Now I have a dual boot setup with XP on one hard drive and Windows 7 on the other.
Just need to fix my unstable overclock which is driving me through the roof (computer freezing constantly).