Because licensing can be so darn confusing; MicroSoft will send you their flash drive with FAQs, Windows Licensing Guide, License Brief, Product Info, Transfer of Volume Licensing Info and additional resources.

Dial up on your Firefox browser:
http://www.microsoft.com/windowsxp/mysterysolved/corp/default.mspx

Click on the ad box with the flash drive pic. The bottom says "Get Yours.""

Sign-in or register (if you have a Hotmail account, you're a registered user already).

Fill out the Mystery Solved Form. Use a valid email and shipping address. Answers to the quiz portion are on the initial page:
http://www.microsoft.com/windowsxp/mysterysolved/corp/default.mspx

This tip discovered at: http://www.passwird.com/