Windows Server 2003 R2

Windows Server 2003 R2 simplifies branch server management, improves identity and access management, reduces storage management costs, provides a rich Web platform, and offers cost-effective server virtualization.

Hi I have VIsta in my PC. Can you please tell me how to install Windows Server 2003 in it.
Also i have server 2003 CD and crack. But when i tried to install it on XP, it is asking for key code which i dont have it. how to disable that. Please advise....