[gPXE] gpxe user confusion

[das_deniz]

patient pxe people,

after months of usage -- pretty much as described here
http://etherboot.org/wiki/httpboot --  we were recently pushed out of
our comfort zone (read as "gpxe times out at dhcp net0 on new hardware
HP ProLiant BL460c G6 Server) and have thus been pests on IRC.

to sum up our new points of confusion:

1) if we're chaining, as described here, http://etherboot.org/wiki/pxechaining,
and not burning gPXE ROMs for NICs, are we always using the UNDI
driver ?

2) we're building an embedded gpxe script into our image much like
what is available in syslinux gpxe sources.

    make -C src bin/undionly.kkpxe NO_WERROR=1 EMBEDDED_IMAGE=../
pxelinux.gpxe,../../core/pxelinux.0

where pxelinux.gpxe is our #!gpxe script and core/pxelinux.0 is the
syslinux image

kkpxe is good as we'd like to have iSCSI keep-san 1 for some installs
that don't provide native support in the OS

the question here is are we undionly or is it trying to use native
drivers when the result of this build is served to the PXEBOOT client.

thank you for your help and patience.

d.