First of all check the domain name you want to buy is available, use our checker here:
http://www.InchberryHosting.com/hosting/domains.asp
Once you have found an available domain name open a helpdesk ticket with your current Inchberry Hosting username and list any new domains you want registered. We will send a request for payment by email or we will call you for your payment details.
A member of staff will promptly register your new domains and confirm back in your ticket.