Own nameservers, help with settings please

Hi to all!

What i have: ubuntu 9.10 and ispmanager(with lamp of course) install on it.

To my linode was adding one extra ip address.

Now i decided to customizing name servers in ispmanager for future to adding new domains:

http://en.ispdoc.com/index.php/Сu … ISPmanager">http://en.ispdoc.com/index.php/СustomizingnameserversinISPmanager

There is no problem for me. Next:

My domain have namerservers of registrant (ns1.registrant.tld and ns2.registrant.tld) and i have managed dns setting on it. (for google aps). Also i add "A-type record":

@    A       109.74.201.19

for direct to my linode server. That's ok. Next:

Problems for my brain:

I do not want use linode's nameservers(and DNS Manager) for customizing name servers in ispmanager. I want use DNS Manager of my registrant.

For correct customizing name servers in ispmanager:

1) What settings i should to make in my DNS Manager of registrant?

2) What settings i should to make in my linode network, ubuntu server?

Please help me.. 8(

Sergey, hello from russia.

tnx