dns question

[nuke3d]

hello
I have a question regarding dns setup. I want to install ispcp on domain admin.X.com. Now there is no dns entry for X.com anywhere so I have to register ns1.X.com on the IP of my server. The problem is that there is no dns config for X.com on my server either because I just start installing ispcp, which will create dns records for the admin.X.com domain, but no one knows how to acces that because the ispcp setup doesn't create any zones for X.com.
Should I manually add a zone for X.com before setup, specify admin.X.com as the ispcp domain, and then later add the domain X.com to a user? If so is it possible to add a NS entry to a zone file via ispcp? Because that's what I'd have to do to get the admin.X.com working.

Maybe I've got this whole dns story wrong, if so I'd be glad if someone could point out where I've gone wrong