Windows XP Professional x64 Edition
Integrated Service Pack 2
English Language (US)
Bootable CD image (ISO)
integrated sp2 and
The key code is in a file called KEY.txt
As this is a Corporate edition, you won't need to activate it either.
Burn to CD using Nero or equivalent "burn image" feature. Boot from CD, install.
Sometimes the installer complains about a file it can't find or some failed operation: just continue with your installation, it works.
Overview of Windows XP Professional x64 Edition