Below you will find the steps needed to change the DNS Nameservers for domains registered with GoDaddy.
1) Login to your GoDaddy Account Manager
2) In the domain section, click Launch
3) Select the domain you wish to change the nameservers
4) Located in the nameservers menu, click Manage
5) Select Custom from the setup type.
6) Click Add Nameservers
7) Add the nameservers you wish to use.
8) Click Save