Pengineer I'm sue this thread will get removed as you seem to advocate software piracy and that has to be the worst reason ever for justifying it. If you'd of looked at another thread on XP you would of found the following that I had put on it. So what's your excuse now!
Found out this today - Within 30 days of installing the OS you must activate it with MS. Windoz XP sends a numeric identifier generated from 10 of your pc's components to MS's server, which in turn sends you a certificate activating your copy of XP on that machine.
If you try to install XP on a different pc, producing a new hardware identifier, a dialog box will pop up asking you to call an operator and explain the discrepancy. If satisfied with your response (MS says it will give users the benefit of the doubt), the operator will issue a new certificate.
If you have a network card and leave it alone, you should be able to remove or replace upto 6 other signature elements without triggering activation, MS says, otherwise, you can change up to 4 other elements before having to contact MS. Adding components never triggers a challenge.
Importantly, WPA resets after 120 days, using whatever you have then as the activated configuration. So after 4 months you can install XP on a second PC, activate it and keep the first one operating without falling foul of WPA.
Doing so would violate the licence, but MS is probably wise in cutting some slack here.
Hope that you find that useful.