Thanks very much LKT for your comment.
First of all I would like to let you know that Microsoft Never Create the Live CD.
The live CD or Portable Windows Edition that you saw like Windows Vista Live CD, Windows XP Live CD on the pirate web sites were created by the crackers.
Windows 7 is now in Beta Release, this for Testing purpose only, not for Production or Commercial use, The use of this Beta version the mean you are agree to the EULA of the Product.
Testing purpose means you can try if it's working with your current PC's capacity or not, and try to play around with its New features.
Regarding to the Cracked CD or DVD on the Market, It's your own risk, Since Windows 7 is just in Beta,
So why you try to use the Pirate/Cracked Copy?
Are you (people who installing this Cracked version) going to use this Beta Release forever?
Please Note, Event Windows 7 is now in Beta, after you installed, it'll notify you that you can try it for 30 days without product key, but if you want to use it more longer you can get the genuine key Directly from Microsoft for free, and this key will be expired on August.
The New Release of Windows 7 will be available soon.
More about this issue please read WeekNote Digitally Magazine (PDF) soon and It's free.
Thanks
Piseth
Dynamic of Satic