I faced the same problem during installation.In my case LILO wasn't getting installed on either MBR or HDA. I recommend that you install LILO onto MBR.
But anyways I had to install it manually. After booting from Disc-1 mount your installed Slack onto /mnt/ folder. Then you can exec /sbin/lilo within it to install LILO. You may also want to edit LILO config at /etc/lilo.conf.
Thats how i did it and it worked. Hope it does the same for you.
Last edited by coolfrog; 01-17-2005 at 11:34 PM.