Automatically get nameservers

[George Vanev]

I have a FreeBSD 6.1 box for a gateway.
It connects to ISP via pppoe.
In /etc/ppp/ppp.conf i have this line:
enable dns
so I have the necessery nameserver-s in /etc/resolv.conf
So far, so good...
I want Windows client machines, connected to the FreeBSD box
to get the nameservers automatically.
Can you tell me how this may be done?!
Regerds
-- 
George Vanev