The most important thing is to make sure you actually OWN the copy of server 2003 you are trying to install. If you do, then you probably would not be asking such a question. But, if you must know, the trial version of Win2k3 server installs just fine. There are various guides posted that show you how to make 2k3 server act like a workstation, although it defeats the point. Lastly, if you really want to use your system, leave XP pro on it since some consumer software will not install on 2k3 server since the company would rather have you buy their server version. I hope this is clear.