The form has two columns, the left column has the attribute names which are links to the help page explaining what type of information is being requested for the blank or select menu in the right name. Once done filling out all the required (denoted by an asterix (*) after the attribute name) information, you enter the 4 digits in the captcha area at the botom corresponding to the image, and click the Welcome button at the bottom.
The form sends the new user a welcome email with their login and temporary password. The new password is set to expire in a few days.