How to change root password outside of Single user mode if grub is password protected from live cd

chroot_live_cd.sh

# vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "RootGroup00" using metadata type lvm2
# vgchange -a y RootGroup00
# lvdisplay
  --- Logical volume ---
  LV Name                /dev/RootGroup00/RootVol00
  VG Name                RootGroup00
. . .
  --- Logical volume ---
  LV Name                /dev/RootGroup00/SwapVol00
  VG Name               RootGroup00
# mkdir /mnt/recovery
# mount -t [ext3,ext4,xfs,etc] /dev/RootGroup00/RootVol00 /mnt/recovery
# chroot /mnt/recovery /bin/bash
/ # passwd