If you wish to change name server information for a domain registered through WinHost:

1. Go to the Domain List in Control Panel
2. In the Whois Record column for the appropriate domain name, click Edit
3. Scroll down to the bottom of the page for the Nameservers section
4. Make the desired changes and click Update

Note that name server changes can take time to propagate throughout the internet. Always allow 24 to 72 hours for the changes to become available to everyone.