Судя по тому, что мне удалось найти (http://packages.ubuntu.com/oneiric/lupin-casper), необходимо редактировать initrd:
Code
if find_path "${iso_path}" /isodevice rw; then
echo "LIVEMEDIA=${FOUNDPATH}" >> /conf/param.conf
if [ -f "${FOUNDPATH}" ]; then
echo "LIVEMEDIA_OFFSET=0" >> /conf/param.conf
fi
else
panic "
Could not find the ISO $iso_path
This could also happen if the file system is not clean because of an operating
system crash, an interrupted boot process, an improper shutdown, or unplugging
of a removable device without first unmounting or ejecting it. To fix this,
simply reboot into Windows, let it fully start, log in, run 'chkdsk /r', then
gracefully shut down and reboot back into Windows. After this you should be
able to reboot again and resume the installation.
"
fi