claire sambrook's dashboard

Hi - I bought 2 domains with you:
loveyourbikeportsmouth.co.uk and visuallibraries.com
and where I work at Portsmouth University they will be taking these over on their server as I need database php etc . . . so they have asked me for the following:
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The registrations that you have paid for all need to be set to be looked after by us. Basically you need to attach NS records in this form:

port.ac.uk. IN NS dns0.port.ac.uk.
port.ac.uk. IN NS dns1.port.ac.uk.
port.ac.uk. IN NS dns0.soton.ac.uk.

It should be under a DNS setting with your domain name reseller.
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So how do I do this?
thanks
Claire Sambrook