Thanks Josh. There was a way to do this using netboot. It was
tricky because "Netboot" service doesn't necessarily have to be ON
in order for this to work. I simply enable Built-in Ethernet port,
check "images" and "client data" boxes on server harddrive, then
enable netboot/dhcp filtering box under filters tab. Once this
configuration is completed, NetBoot controls BootP to send
information.
At least now the filter box is labeled that it will filter DHCP as
well. Before it only said Netboot in the GUI.
This works because both Netboot and DHCP are run by bootpd on Mac OS X.