Administrators Settings
Under the "Settings" heading in the admin left hand nav bar are two links, Edit Admins & New Admin (amongst the other links). One is for editing existing admins, and the
other for creating new admins
If you click on the edit admin link, you will go to a page that shows all your current admins. By clicking on the pencil graphic, you can edit each admin (you can have mulitples) account. After going to the next page, you will see you can change the "Full Name" (Real name of the admin), "User Name" (login user name), "Password", "Email" (of that admin) and the "Give right to admin?" checkbox. If this last box is not checked, that admin will only have limited admin rights. Checking the box gives full rights, so always make sure the box is checked if you edit your own admin account!
The "New Admin" link simply gives you the same screen as above, but a blank record to start from.
When you login to your admin section for the first time using the default admin user/pass, be sure to change the user/pass to protect your admin backend.