Rescue mode

This concerns the rescue mode operation in Fedora Core-3/EL-4 ,
this is my partitions
/boot ,/usr , / on seperate partitions
# mkdir /mnt/sysimage
#mount </ partition> /mnt/sysimage
#chroot /mnt/sysimage
i get my /bin/sh
#grub-install /dev/hda.... the /dev directory only has a single entry
called null since UDEV has not created any entrys in /dev
no such device! | /usr/share/grub/1386-redhat/stage1 not
found.........is the error i get
#grub-install '(hd0,0)' ......../usr/share/grub/i386-redhat/stage1 not
found!!!!!!!!!!!!!!!!!!!!!!,is the error message i get
my /usr does not contain any such file!,the CD environments /usr
before chroot also didnt have that file...........................
How can i install Grub?

i have often found the' grub-install ' command not-working properly
always........is there any trustworthy method?