The first "message keys" mentioned in this article are allready present in Windows XP registry. You only have to add the "values". For those unfamiliar or uncomfortable with policy edit or "extra software", one can make various "messages" at these keys, and export each setting to a ".reg file". Then one can change the "message of the day/week" simply by running the reg-file at the actual computer(s). The alternatives can be made and saved at any computer, and distribute upon needs.