To configure LILO, simply edit the
/etc/lilo.conf then make additional changes and run
lilo as
root to update your system.
A typical
/etc/lilo.conf file should look similar to this:
boot = /dev/hda # or your root partition
delay = 10 # delay, in tenth of a second (so you can interact)
vga = 0 # optional. Use "vga=1" to get 80x50
#linear # try "linear" in case of geometry problems.
image = /boot/vmlinux # your zImage file
root = /dev/hda1 # your root partition
label = Linux # or any fancy name
read-only # mount root read-only
other = /dev/hda4 # your dos partition, if any
table = /dev/hda # the current partition table
label = dos # or any non-fancy name
More information on LILO can be found
here.