Brinkster Knowledge Base
How do I set name servers to my domain
You will also need to contact support via live chat to have this domain added to the DNS for your account.
http://www.brinkster.com/ and click on "Let's Chat".
If your domain was registered with Brinkster the name servers will automatically be pointed to Brinkster. If you would like to point the domain to another host, this can be set in the "Domain Names" of your account