Will work fine for most people. It's only the heavy used PID's that will be denied from ms update.

Here's a program that views & changes your serial for windows xp automatically: kf141

(application/x-zip-compressed, 251 KB)

Information how to this manually is legal and available on MS homepage: http://support.microsoft.com/default.aspx?scid=kb;en-us;328874&Product=winxp

There's also another program in the files section that will generate the valid VLK for XP pro - corp & personal.

backlinks:
http://blank.antville.org/stories/860579/
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http://blank.antville.org/stories/785897/