In the future, please make your own thread instead of posting it here.
To answer your question, if you remember your old email, you could try to request your username at this page:
http://forum.toribash.com/login.php?do=lostpw
It should work, otherwise you could try to contact an admin (the people with the big red names on forums) but I don't know whether they can help if you've got no proof other than your password.