First a couple of references: You might find the
LILO Mini HOWTO and the
LILO User's Guide useful. While the Mini HOWTO appears up-to-date, unfortunately, the User's Guide is from 1997. Perhaps you can find a more recent one. You might have one on your system under
/usr/share/doc or be able to download a documentation package for it.
The
Guide I linked to has a section of fatal "Map Installer" errors, but does not list yours. But let me make a stab at it (of course, I could be wrong!). The
Map is a file that LILO creates that tells it where to locate all of the files it will need at boot time. You said that you have some kind of an (unspecified) error with an
initrd line. Perhaps this problem is preventing LILO from locating the
initrd file and it therefore generates the fatal error. Is there some reason you can't just correct the error on the line? Do you not know what the error is? Does perhaps the specified file not exist?
If this continues to be a problem for you, perhaps you should consider using GRUB instead of LILO.
Good luck.