Use Your Gamer Launch Account
Your account from any Gamer Launch site is valid here.
If you already have a Gamer Launch account connect your Facebook account on your user profile first before using Facebook connect to login. Otherwise you may end up with a new account.
NOTE: The signup column shows both the number of characters and the number of members that are signed up for an event. The format is (Characters - Members)
Please follow Discussion URL to see the full strat (not enough room to post here). Keep in mind, the only video guide posted from tankspot was for the 25 man version, but is still helpful.