Create the file /etc/kernel-img.conf and insert the following lines:

postinst_hook=/sbin/update-grub
postrm_hook=/sbin/update-grub
============================	install grub on floppy
dd if=/boot/grub/stage1 of=/dev/fd0 bs=512 count=1
dd if=/boot/grub/stage2 of=/dev/fd0 bs=512 seek=1

============================	configure grub
grub> root (hd0,0)
find /boot/grub/stage1
grub> setup (hd0)

grub-install --root-directory=/ /dev/hda