First you need to go sign up for your domain name at http://www.uni.cc before you go to cpanel. And I'm assuming you want this to be a Parked Domain and not an Addon Domain, right? The difference is that an Addon Domain is a sub directory on your site and a Parked Domain is your site.
I have my website address darkstar.heliohost.org
Now I log unto uni.cc and sign up.Sign up is free.Then I type dstar to check If it is available.Now in Domain Configuration of uni.cc it asks for Record Type and give me 3 options
1) NS (For external name servers)
2)"A" and "MX" (at UNI.CC' DNS)
3)Google Apps/Google sites
It's clear that I can not use the third option so I have to choose from first 2 which i do not know how to configure