Register first: http://my.freenom.com/register.php
Then click this link to register your free domain: https://my.freenom.com/domains.php
Go to this link: https://my.freenom.com/clientarea.php?action=domains
Then click to Manage Domain.
Then click to Management Tools and select Nameservers.
Then select Use custom nameservers (enter below).
Type below the following of our default nameservers:
Nameserver 1: NS1.GOMANILAHOST.NET
Nameserver 2: NS2.GOMANILAHOST.NET
Nameserver 3: leave it blank
Nameserver 4: leave it blank
Nameserver 5: leave it blank
Then Click Change Nameservers.