Subject pretty much covers it.

I want to create a local zone file for our GWAVA to access as an RBL.
I would like to import the files from (amongst other places)

DNS/DHCP Manager can't seem to cope with the format. ("not a bind file")

Is there a how-to on how to do this?

OES/NW6.5 SP6 etc.

I want to be able to block (say) Korea and China in-toto as well as add my
own ranges etc.

We block some stuff at the Pix Firewall, but creating individual filters
through the GUI is not practical for large numbers and I'm not sure how or
if it can be done some other way.

Any one able to help?