domain mapping - map domains using cPanel on the same server


I have the following scenario and requirements:

Multisite installation and domain mapping installed on eg.
I have additional sites installed in subfolders. eg. etc
I have a domain with it's own cPanel, residing on the same server as my multisite install, that I need mapped to How do I do this without having to move the domain or cancel it's cPanel account?

I look forward to your reply.