iPXE

ipxe.iso

Press Ctrl-B for the iPXE command line...

ifclose net0
set net0/ip 192.168.0.100
set net0/netmask 255.255.255.0
set net0/gateway 192.168.0.1
set dns 192.168.0.1
ifopen net0
chain http://boot.ipxe.org/demo/boot.php