Here's a very detailed paper on how Windows XP activation works. http://www.licenturion.com/xp/fully-licensed-wpa.txt They even have a program (and source code) for decoding what the activation code is doing (http://www.licenturion.com/xp/). ¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤ michael mcglynn interface designer ¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤ _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/