Came across this while searching and it's worth looking at.
It's not that hard to do!
It's a core linux product but maybe it could be incorporated into Woof.
https://github.com/patatetom/isohybrid-bios-uefi
and
http://www.syslinux.org/wiki/index.php?title=Isohybrid
isohybrid-bios-uefi - one way
@scsijon Do you want a live-cd that boots from both BIOS and UEFI? Just look at this thread http://www.murga-linux.com/puppy/viewtopic.php?t=109396. It is tested on virtualbox with UEFI enabled