DNS "override" on private ip addresses?

[Jonas Larsen (remove nospam)]

Hi!

I want all hosts using dns1 to get:
unixlab1.company.com = 193.44.102.15

And all hosts in the lab using dns2 to get:
unixlab1.company.com = 192.168.254.15

The problem is that dns2 have to use dns1 for lookups of hosts outside of
the lab...

Have do I make an "override" in dns2 for those few lab-hosts? Or any other
solution?

Thanks in advance!

Regards,
/Jonas