Sort answer, NO... this is illegal and pirating. No ok to do. Agreed Tony As Tony said, what you want to do is illegal, and pirating, and as far as I know, it is IMPOSSIBLE to use the key from a Win XP CD more than once per install - The Key is specific to the CD, and will need to be activated - When the activation fails, you would have to call MS and have it activated. Additionally, when MS does Validation to see if you are running a "legit copy of Windows" using that Validation Tool, it would find a problem, and say that your copy is not legitimate - XP Keys may be used to reinstall an OS