I recently purchased 2 copies of Windows 2008 R2 Datacenter edition from a reseller. I have the product key but the media disc seems to have been lost in the mail. Can I use the 'VL Build' ISO from MSDN with my key? Is it the exact same disc? ...I assume the key I was given is a multiple activation key since they only gave me one key even though I bought 8 CPU licenses (4 servers with 2 CPU each).