At the WordPress login screen, simply type in ‘admin’ for the username and then the email address you used for the admin account when setting up. WordPress will send you and email to log in again.
If you don’t know the email address, you’ll have to delve in to the MySQL database and check out the wp_users table and check the table row for the admin user. It will have the email address there; you can change it here if you no longer have the same email address, but you can’t change the password here because it is MD5 encrypted.
Actually, it’s very easy to reset the Admin password via phpmyadmin. See: http://www.tamba2.org.uk/wordpress/phpmyadmin/
