IpFire direct installation from network (iPXE)
iPXE commandchain http://mirror1.ipfire.org/releases/ipfire-boot/latest/undionly.kpxe
chain http://mirror1.ipfire.org/releases/ipfire-boot/latest/gpxe.kpxe
Links
http://wiki.ipfire.org/de/installation/pxe
http://mirror1.ipfire.org/releases/ipfire-boot/latest/
http://planet.ipfire.org/post/introduction-to-boot-ipfire-org