A friend of mine from work went to a Microsoft .NET seminar at Temple. He recieved a version of XP Professional. But it says on the cd that it is not for oem distribution or retail sale. He says its a full version. And it has a cd key number on the back like an oem version. He offered to trade me that for a new 16X cdrw that I bought on a BB deal a few months ago. Can I use it and is it a real full version? I don't have any idea what the NFR means and I tried to search it here but came up empty. So can someone explain it to me. Doesn't XP have like a real funky registration rule or something? Any help is appreciated. THX