Notice the boot below;
# LILO configuration file
# generated by 'liloconfig'
# Start LILO global section
# Append any additional kernel parameters:
boot = /dev/sda
# Boot BMP Image.
If you are chain loading then the partition could be used for another loader on your drive(sda1) assuming you wrote to the 'MBR' with a bootloader on '/dev/sda'.
I suggest that you do a 'man lilo' & 'man lilo.conf'. Your stanza information for each image will define the device parameters.