Subdomain Delegation to Many DNS Servers

[Paulos Putremos]

hello folks

i'm just about done setting up a system whereby 1 FQDN is loadbalanced
between many sites and servers i.e. https://secure.mydomain.net

I'm using a Cobalt RaQ server running BIND 8.2.3 and using the GUI
interface you can delegate authority for a subdomain to only 2
nameservers. In the past I successfully managed to edit
/etc/named/records to add a third nameserver but I can't get it right
this time!

here's the way the GUI sets it up in records:

subdomain secure mydomain.net
site1.petrolink.net::site2.petrolink.net: -

and I need to add site3.petrolink.net on the end of there too, but i
can't get my colons and hyphens in the right place..

Thanks in advance for any help/advice

Paulos