First edit your lilo.conf for boot on raid (it's a good ides to let a an entry for boot on the old systen in cause of an failue).

fcmaster01:/# ln -s boot/initrd.img-2.4.18-1-k7.raid initrd.img.raid
fcmaster01:/# vim /etc/lilo.conf
...
fcmaster01:/# cat /etc/lilo.conf
lba32
boot=/dev/hda
install=/boot/boot-menu.b
map=/boot/map

# message=/boot/bootmess.txt
        prompt
#       single-key
        delay=20
        timeout=50
vga=normal

default=Linux
append="devfs=mount"
image=/vmlinuz
        root=/dev/md/1
        label=Linux
        initrd=/initrd.img.raid
        read-only
#       restricted
#       alias=1

image=/vmlinuz
        root=/dev/hdc1
        label=LinuxSAV
        initrd=/initrd.img
        read-only
#       restricted
#       alias=1
fcmaster01:/#
fcmaster01:/# lilo
Added Linux *
Added LinuxSAV
fcmaster01:/#

Now we can transfer our root-filesystem (i recommend to do this in single user mode):

fcmaster01:~# cd /
fcmaster01:/# mount /dev/md/1 /mnt
fcmaster01:/# find . -xdev | cpio -p /mnt/

After the copy edit your NEW fstab and replace hdcx with md/x:

fcmaster01:~# cat /mnt/etc/fstab
# /etc/fstab: static file system information.
#
# >file system< >mount point<   >type<  >options<               >dump<  >pass<
/dev/md/1       /               ext3    errors=remount-ro       0       1
/dev/md/5       none            swap    sw                      0       0
proc            /proc           proc    defaults                0       0
/dev/fd0        /floppy         auto    user,noauto             0       0
/dev/cdrom      /cdrom          iso9660 ro,user,noauto          0       0
fcmaster01:~#

Now we are ready to reboot !