No... He's saying that when he installs XP, his Product Key is accepted. But when he installs 2000, he uses the same Product Key and it doesn't get accepted. He's trying to edit the SETUPP.INI file to change the kinds of keys that get accepted. Should we allow this on the forum? looks like someone was right. Don't make me raise your warning level! Oh well, his explanation seemed a bit confusing to me!