If you have additional domains that you wish to host within your existing hosting account, displaying the same content as your main domain (for example, domain.com and domain.co.uk), you can actually do this using the 'Aliases' feature from within the Domains section of your hosting account control panel (cPanel).
Once you have logged into your cPanel, please navigate to the Domains section and click on the icon for Aliases. You can enter the domain name within the Create a New Alias box and click Add Domain. Once this has been added, you can manage the domain accordingly from within the Aliases screen. You will also be able to configure email addresses and forwarders for your Aliased Domains from within the Email Accounts / Forwarders sections of your cPanel.
There are a number of helpful video tutorials available within cPanel for numerous features. If you require further assistance though, please do let us know.
