This starts to fix the scripts so that they load from /usr/lib/crosutils

mk_memento_images.sh

 #!/bin/bash
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script takes a path to a rootfs.ext2 which was generated by
 # build_image.sh and generates an image that can be used for auto
 # update.
 
 set -e
 
+# --- BEGIN COMMON.SH BOILERPLATE ---
+# Load common CrOS utilities.  Inside the chroot this file is installed in
+# /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
+# location.
+find_common_sh() {
+  local common_paths=(/usr/lib/crosutils $(dirname "$(readlink -f "$0")"))
+  local path
+
+  SCRIPT_ROOT=
+  for path in "${common_paths[@]}"; do
+    if [ -r "${path}/common.sh" ]; then
+      SCRIPT_ROOT=${path}
+      break
+    fi
+  done
+}
+
+find_common_sh
+. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
+# --- END COMMON.SH BOILERPLATE ---
+
+. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
+
 # Load functions designed for image processing
-if ! . "$(dirname "$0")/lib/cros_image_common.sh"; then
+if ! . "${SCRIPT_ROOT}/lib/cros_image_common.sh"; then
   echo "ERROR: Cannot load required library: lib/cros_image_common.sh; Abort."
   exit 1
 fi
 
 if [ -z "$2" -o -z "$1" ] || [ "${#@}" -ne 2 -a "${#@}" -ne 3 ]; then
   echo "usage: $0 path/to/kernel_partition_img path/to/rootfs_partition_img"
   echo "    or $0 path/to/chromiumos_img kern_part_no rootfs_part_no"
   exit 1
 fi
 
@@ skipping 80 matching lines @@
 set -- $CS_AND_RET_CODES
 CALC_CS="$1"
 shift
 RET_CODES="$@"
 if [ "$RET_CODES" != "$EXPECTED_RET_CODES" ]; then
   echo compression/hash failed. $RET_CODES
   exit 1
 fi
 
 echo Success. hash is "$CALC_CS"