I have installed GRUB:

i-was:/boot/grub# grub-install /dev/hda
Searching for GRUB installation directory ... found: /boot/grub
Installation finished. No error reported.
This is the contents of the device map /boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.

(fd0)   /dev/fd0
(hd0)   /dev/hda


But with "strings /dev/hda" the output is still with LILO and an alert about Stage 2

i-was:/boot/grub# strings /dev/hda
LILO
ZRrI
D|f1
GRUB
Geom
Hard Disk
Read
 Error
pPf1
Loading stage1.5
Geom
Read
 Error
0.97
/boot/grub/stage2 /boot/grub/menu.lst
^_[]
[^_]
t 9u
[^_]
PjuS
PPRh
t2SShP>
Error %u
ext2fs
GRUB loading, please wait...
internal error: the second sector of Stage 2 is unknown.
r of Stage 2 is unknown.