Upon discovering this contest, I myself, have dropped a comment in the form, so now I think you have an “idea” on how to join the contest. Simply leave a comment with “your (nick)name, email address and Web address (if you are a blogger) and you are automatically in for a chance to win one of the licenses.”.
Like any contest there will be a random draw of the winners, and hurry-up entries will be close up until November 1st. Looks like a Halloween delight for you!
Anyways, you can head on this link to join the contest.