I read earlier, can't remember where, most likely a MS Developer. That the new Windows 7 will have all the versions on a DVD and that the Key "Unlocks" the features. I was really excited to hear this. Well I installed Windows 7 (with the Ultimate DVD) and tried putting a Professional Key. It tells me it is an invalid key for this installation and is requiring me to reinstall??? Does anyone remember M$ toting this as a great feature for Windows 7... no need to carry around 6 DVD's to help customers?