DNS for Intranet web pages

[sinyce]

Scenario:

Clients -->Internal DNS Server --->F/W ---ISP

All my internal clients make requests to an internal DNS Server (NT 4.0) which forwards to the Firewall and that gets the pages from my ISP.

Problem:
How do I have my clients type in

http://contacts

and this can resolve to an internal webserver on my WAN?

I do this now by using a hosts file, and this means whenever a new webpage is available, I have to touch every desktop and update that hosts file. With the prolific nature of my web programmers, practically every week, I'm updating the hosts file.

Help! I'm pulling my hair out.

Sinyce