Sorry for the newbish question, i thought i knew how to do this but i just can't get it to work.

How would I go about pointing a domain name I already own to an account on my brand new server which i managing using WHM/Cpanel?

What have you tried that you thought would work and didn't?

What's wrong with just adding it in CPanel under Addon domains or whatever it is, then changing the nameservers for the domain to the ones for your server?

It would be helpful to have some more information on the current set-up of the server. Who knows if the resolv.congf has been properly populated or if any nameservers have been added to the server yet.