In order to change the authoritative nameservers on your Sitelutions-registered domain name to our nameservers, simply login to your Sitelutions account, navigate to the Domain Control Center, and click the check box next to the domain name which you'd like to change. Then click the "Modify Nameservers" link below the domain list. On the screen that appears, choose the "Use Sitelutions Nameservers" radio button and click the "Save Changes" button.