If your domain name was registered through Pickaweb you will be able to manage your domain name through Manage Domain Name

You can change the name servers of your domain name at Manage Domain Name If you cannot remember your username and password please enter your domain name without www at http://www.pickaweb.co.uk/getpassword.html and details will be emailed to you in approx 5 min. Name server changes take 24-48 hours to take effect.