Yes you can do it. Our DNS servers are free, and included with hosting. You can even look at them and configure them in Webmin -> Servers -> BIND DNS Server.
The only action you have to do is telling your registrar that you would like to point your domain on our DNS:
- ns2.cbpolis.com (22.214.171.124)
- ns3.cbpolis.com (126.96.36.199)
Using our DNS will in fact ease your live as they are automatically maintained by our systems.