A friend of mine has a COA (OEM) for XP MCE 2005 but no disks. As I am running an OEM version on a Media Center PC I lent him my disks to install with his OEM COA. He tels me that the software will not recognise the key from his OEM COA on the lent OEM version of MCE. He also tells me that the OEM MCE COA WILL allow an installation of Windows XP SP2. What's happening?