Added configfile configuration via option 150, same option as GRUB uses. To use it do the following in your dhcpd configuration (ISC dhcpd): global: option configfile code 150 = string; host xx { filename "/tftpboot/pxegrub"; option configfile "/tftpboot/menu.lst"; option dhcp-parameter-request-list = concat(option dhcp-parameter-request-list,96); ... }