I've installed Debian through the installer, but I am unable to boot it up now. I had LILO installed when I had Slackware and I had not removed it from the MBR. When I installed Debian, I had Grub put on the MBR through the installer program as well.

Now when I start up my computer, I am unable to boot to anything. I get
to a "L 99 99 99 99 99 99 99..." error. From what I've gathered it is a LILO related error.

At this point how would I be able to either A) completely remove LILO from the MBR and get GRUB on there or B) remove both GRUB/LILO off the MBR and get GRUB on there anew.

If it helps
my partitions are set up as such-
hda1 - (hd0,0) is a windows xp restore
hdb1 - (hd1,0) Debian 5.0
hdb5 - (hd1,4) Swap

I got that information through the Super Grub Disk, which also gave me a "Error 6: Mismatched or corrupt version of stage1/stage2"

Hopefully that helps with resolving the issue.

If you do not already have grub installed then with linux down load and install grub. Then open a terminal and as root type grubconfig install onto the mbr then edit the /boot/grub/menu.1st to load any kernel or windows operating system.
Do not forget to read the help files on this site just key word grub . and you must edit the menu.1st file.

It sounds like either grub isn't properly installed to /boot/grub, or the MBR isn't pointing to the right place. You may have to do a reinstall. Another option is to boot from the install disk, use expert mode, and reinstall grub completely. If it's still wonky, try using the "dd" command to zero out the first 446 bytes on the disk then reinstall grub.