The Pid value is what we're in this for. What's there now looks like a standard default, but that is no good. There are special numbers that determine if it's a retail, OEM, or volume license edition. First, we must break down that number into two parts. The first five digits determines how the CD will behave, i.e. is it a retail CD that lets you clean install or upgrade, or an OEM CD that only lets you perform a clean install? The last three digits determine what CD key it will accept.

You are able to mix and match these values. For example you could make a Windows XP CD that acted like a retail CD, but then yet accepted OEM keys.