WinXp product ID & Cd Keys

[mattri]

Okay I have read a bit on Sp1 and ways to get around it, but it is my vague understanding that even if that is installed the updates will not be available due to a blocked product id even if i do change my Cd key. Is this correct? And if so is there any way to get around this?

Thanks in advance

Matt

[djwhite]

Just chaning the CD key will do