Network DNS server and DHCP Client

I have been searching for a how-to and the above matter, but have not found anything applicable to what I want to do. I have a netgear router-firewall-DHCP. I am presently using this DHCP with the 3 computers I have on my network. I want to add a server which would have DNS server so I can locate the machines by name on the network. I have found info where the server is both DNS and DHCP server, but nothing for the DNS Server getting info from an external DHCP server for the DNS. Does anyone have any ideas on how to do this or where there is info on this? Art