Settingup your own Domain
From Shopnix Help
Setting up your own Domain Name
Your domain name is a unique name to identify you on the internet. Its the URL that you type into the address bar to reach your store. When you sign-up to Shopnix you are given a free domain that looks like http://<yourstorename>.shopnix.in
However we understand that you would want a more customised domain name like http://<yourstorename>.com
For this you will need to first purchase a domain. Below is a list of firms that can help you with this.