Microsoft Windows Server 2008 R2 Enterprise x64 SP1 Integrated 
Quote:
Description: Windows Server 2008 is the most advanced Windows Server operating system yet, designed to power the next-generation of networks, applications, andWeb services. With Windows Server 2008 you can develop, deliver, and manage rich user experiences and applications, provide a highly secure network infrastructure, and increase technological efficiency and value within your organization.
Size: 2.91 GB
HowTo:
Extract Files
Burn Image to DVD
Boot from DVD
Install to unpartitioned space without serial
Check BIE-Dir on DVD
