This is a setup ISO of Microsoft Windows Server 2008 x64.

All editions included (Standard, Enterprise, Datacenter) and all
offered with and without Hyper-V (so 6 choices at install screen).

Temporarily Bypass Windows Server 2008 Activation:

http://www.petri.co.il/bypass-windows-server-2008-activation.htm

Solution to get it bootable:

Download latest vLite: http://nlite.boot-land.net/vlite/vLite-1.1.1.installer.exe

Copy contents of "Windows.Server.2008.x64.iso" to a folder.

Open vLite. Browse to folder with ISO contents (windows installation files).

A screen will pop up with 6 choices, choose whether you want
Standard, Enterprise, Datacenter, with or w/o Hyper-V (CORE is without)

Click Next. At task selection screen ONLY select "Bootable ISO"

Click Next. At bottom right, click "Make ISO". Save it to disk.

You now have a bootable copy of Server 2008 x64.
Download windows server 2008