yes, but they can not all be in use at the same time, only one of these key's can be used on a computer at a time, to not follow this is against the usage term thing....i can't remember the name of it.
Once upon a time (before I bought a legit copy of XP) I used something to validate it. Now, you had to enter a correct key, but then if it was i use, you just added a quick change to the registry. Would changing the registry to do that be 1) Legal? 2) Against the EULA?
And what about a keygen for it? If you found a legit code? (I've used this stuff before, but now I bought mine, . So I'm just wondering)