Windows Server 2003 - XP Conversion Pack
As many guys know that Windows Server 2003 uses the newer kernel which is faster, more stable and has better memory management. Despite the fact it's made for server purposes, some claimed it's optimized for workstation purposes very well in SP1. So I gave it a try for workstation conversion and it was really a worth try. Then I decided to make conversion tool that turn Windows Server 2003 to completely Windows XP. This works on both Windows Server 2003 and Windows Server 2003 R2 and it's highly recommended to install Service Pack 1 before apply the conversion.
The license of this software is Freeware, you can free download and free use this server utility software.