Actually, now that I'm refreshed, I think we might be able to bypass the whole 'chroot' process.

Ok, what you will need to do now is:
1. boot with the floppy
2. when it asks for boot parameters, type in
root=/dev/hda5 (or whatever partition your GNU system is installed on)
3. after it finishes booting, you will need to log in as root
4. run 'lilo' from the command prompt

If lilo gives you problems, then you will need to edit your /etc/lilo.conf file. There are lots of sites that will help you configure lilo.

good luck