win2k3 = win2k server winxppro = win2k pro so, you can see that M$ did a lot to make them look different, take care. the only truth is win2k3 has a lot of tools only made for server while xp has an "enough" friendly gui for you, got it? but, who care which is a bit faster if his hardware is strong enough? if you couldn't get satisfied by them, use nlite. lol I did not choose 2k3 only because of the inconvenience, I'm a lazy man. if you are a man that like to do everything by yourself, I strongly recommand that you use 2k3. btw, their core are the same.