Replied On: 08/17/2012 at 11:15 PM
In the top left corner, you should have a dropdown menu titled with your profile name (should be Gamdrin for you). There's an "Edit Profile" choice in the menu. On that page are fields where you can fill in both "Username" and "Website Handle". Website handle should be what you want, if I'm understanding you. It will change what you're known as in the forums.