Windows xp 64bit Genuine SP1
This edition supports the x86-64 extension of the Intel IA-32 architecture. x86-64 is implemented by AMD as “AMD64″, found in AMD’s Opteron and Athlon 64 chips, and implemented by Intel as “Intel 64″ (formerly known as IA-32e and EM64T), found in some of Intel’s Pentium 4 and all of Intel’s later chips.

Windows XP Professional x64 Edition uses version 5.2.3790.1830 of core files, the same version used by Windows XP 64-bit Edition 2003 and Windows Server 2003 SP1 as they were the latest versions during the operating system’s development.

During the initial development phases (2003–2004), Windows XP Professional x64 Edition was named Windows XP 64-bit Edition for x86 Extended systems and later, Windows XP 64-bit Edition for Extended systems, as opposed to 64-bit Edition for Itanium systems.

Download Links
first download service pack 1 from here

http://rapidshare.com/files/158728400/64_by_atapaje.part1.rar

http://rapidshare.com/files/158728261/64_by_atapaje.part2.rar

http://rapidshare.com/files/158728405/64_by_atapaje.part3.rar

http://rapidshare.com/files/158728327/64_by_atapaje.part4.rar

http://rapidshare.com/files/158728344/64_by_atapaje.part5.rar

http://rapidshare.com/files/158728203/64_by_atapaje.part6.rar

Burn using nero burning rom with very low speed… Install..

once xp has installed download the service pack 2 from here

http://www.microsoft.com/downloads/info.aspx?na=90&p=&SrcDisplayLang=en&SrcCategoryId=&SrcFamilyId=893fd6c0-6283-44c3-bb84-b2f0315b2ae6&u=http%3a%2f%2fdownload.microsoft.com%2fdownload%2f8%2fb%2f2%2f8b2347d9-9f9f-410b-8436-616f89c81902%2fWindowsServer2003.WindowsXP-KB914961-SP2-x64-ENU.exe

Once you have installed service pack 2 use this patch to activate xp x64

http://www.mediafire.com/?mgobo94zuwd