This article explains how to configure personal nameservers for a domain that has been purchased through NDC Host:

1. Log into http://billing.ndchost.com
2. From the My Sites menu click on My Domains.
3. Select the domain form the list you want to register as a namesever by clicking on the URL's hyperlink.
4. From the left navigation menu that load click on Register Name Server.
5. In the Register New NameServer section, fill the nameserver: field with the name of your new nameserver (e.g. ns1.example.com) and fill the IP Address: field with the IP address of the server that nameserver will be on, then click Submit Changes.
6. Repeat step 5 for any additional nameservers.

Notes: Make sure the server you will be using has A records that match the entries here, and that this domain is set to use itself as a nameserver. For example, example.net has to use ns1.example.net and ns2.example.net and the server that ns1 and ns2 are registered to must have A records pointing to the respective IPs for each nameserver:

example.net.
ns1 A 10.0.0.1
ns2 A 10.0.0.2