Using a different domain name as the DNS server for a domain

[Kaya Saman]

Hi,

I'm wondering if it's possible in Bind like my domain providers DNS 
servers to use a different domain as the name server ns record for 
another domain??

Excuse the horrific explanation I will try to describe what I mean:

I am about to start hosting a domain called birimgrup.com in my network 
but do not wish to create a sub domain as ns.birimgrup.com;

instead I would like to use my own domain which is called 
optiplex-networks.com as the ns server, meaning ns1.optiplex-networks.com:

as example:

 dig optiplex-networks.com

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5 <<>> optiplex-networks.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48891
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;optiplex-networks.com.        IN    A

;; ANSWER SECTION:
optiplex-networks.com.    86400    IN    A    192.168.1.150

;; AUTHORITY SECTION:
optiplex-networks.com.    86400    IN    NS    ns1.optiplex-networks.com.
optiplex-networks.com.    86400    IN    NS    ns2.optiplex-networks.com.

;; ADDITIONAL SECTION:
ns1.optiplex-networks.com. 86400 IN    A    192.168.1.100
ns2.optiplex-networks.com. 86400 IN    A    192.168.1.101

;; Query time: 21 msec
;; SERVER: 192.168.1.100#53(192.168.1.100)
;; WHEN: Tue Dec  1 19:03:00 2009
;; MSG SIZE  rcvd: 123


So practically when someone does a dig for birimgrup.com it will come 
out of ns1.optiplex-networks.com!!

Can this be done?

I am assuming that I could create a zone with record:

birimgrup  in  a  ns1.optiplex-networks.com

but I am just wondering if it will complain that the data is "out of zone"??


As a quick addition also I have never dealt with .net .org etc TLD's 
before when setting up DNS so I'm assuming that for reverse DNS the PTR 
records will simply go into the 192.168.1.rev file I have setup??

Many thanks in advance!

--Kaya