diff --git a/releng/releng_isojigdo b/releng/releng_isojigdo
index d7744272..5a23ef44 100755
--- a/releng/releng_isojigdo
+++ b/releng/releng_isojigdo
@@ -2,139 +2,39 @@
 
 set -e
 
-# START_DIR_DONT_CHANGE=`pwd`
-# SELF=$(basename "$0")
-# required config items
-#CONFFILE=$HOME/.libburnia-releng/${SELF}.conf
-#GEN_DATA_DIR=releng_generated_data/${SELF}
-
 . inc/releng_getopts.inc
 
 if [ ! -x $RELENG_XORRISO ]; then
  print_help
  printf "\n${SELF}: -x  absolute or relative path to binary to be run.\n\n"
- exit 31
+ exit 30
 fi
 
 # check data dir, if any and after checking -x xorriso
 if [ -d "${GEN_DATA_DIR}" ]; then
  printf "\n${SELF}: directory %s exists!" ${GEN_DATA_DIR}
  printf "\n${SELF}: use '${SELF} -c1' to remove.\n"
- exit 8
+ exit 1
 else
  mkdir "${GEN_DATA_DIR}"
 fi
 
 TMP_DATA_DIR=releng_generated_data
 IMG_EXTRACT_DIR=${GEN_DATA_DIR}/${SELF}_extracted_tree
-
-# to be set by the config file
-# RELENG_XORRISO=""
-
 RELENG_DIR="${IMG_EXTRACT_DIR}"
 RELENG_ISOLINUX_BIN="isolinux/isolinux.bin"
 RELENG_BOOT_CAT="isolinux/boot.cat"
 RELENG_IMG=t1
-
-# KEEP=0
 RES=""
-
 REMOTE_URL="http://cdimage.debian.org/cdimage/daily-builds/daily/current/i386/iso-cd"
 REMOTE_IMG="debian-testing-i386-businesscard.iso"
 
-#####
-#print_help() {
-# cat << HLP
-#Usage:
-# ${SELF} -help
-#
-# using a config file ${CONFFILE}
-# ${SELF} -rc [-keep]
-#
-# without using a config file
-# ${SELF} /absolute/or/relative/path/to/xorriso [-keep]
-
-# cleanup test generated data directory and exit
-# ${SELF} -cleanup
-#HLP
-#}
-
-#####
-#cleanup() {
-# if [ ${KEEP} -eq 0 ]; then
-#   # safety net, just in case -> we want to be in the starting
-#   # directory before removing whatever self-generated stuff
-#   if [ -d "${GEN_DATA_DIR}" ]; then
-#       cd "${START_DIR_DONT_CHANGE}" || exit 15
-#       chmod +w -R ${GEN_DATA_DIR}
-#       rm -rf ${GEN_DATA_DIR}
-#       printf "${SELF}: Removed (self-generated) %s\n" ${GEN_DATA_DIR}
-#   else
-#       printf "${SELF}: ${GEN_DATA_DIR} does not exist. Nothing to clean.\n"
-#   fi
-# else
-#   printf "${SELF}: Leaving (self-generated) %s\n" ${GEN_DATA_DIR}
-# fi 
-#}
-
-# cleanup
-#if [ "${1}" == "-cleanup" ]; then
-# cleanup
-# exit 0
-#fi
-
-# help
-#if [ ! "${1}" ]; then
-# print_help && exit 3
-# config file
-#elif [ "${1}" == "-rc" -a "${2}" == "-keep" ]; then
-# KEEP=1
-# if [ -e ${CONFFILE} ]; then
-#  . ${CONFFILE}
-#  printf "${SELF}: Using config file %s\n" ${CONFFILE}
-# else
-#  echo -e "\n${SELF}: Config file ${CONFFILE} not found.\n" && exit 4
-# fi
-#elif [ "${1}" == "-rc" -a ! "${2}" ]; then
-# KEEP=0
-# if [ -e ${CONFFILE} ]; then
-#  . ${CONFFILE}
-#  printf "${SELF}: Using config file %s\n" ${CONFFILE}
-# else
-#  echo -e "\n${SELF}: Config file ${CONFFILE} not found.\n" && exit 4
-# fi
-# cmdline option
-#elif [ -x "${1}" -a "${2}" == "-keep" ]; then
-# RELENG_XORRISO="${1}"
-# KEEP=1
-#elif [ -x "${1}" ]; then
-# RELENG_XORRISO="${1}"
-# KEEP=0
-# the rest
-#else
-# print_help && exit 5
-#fi
-
-#
+# check for required items
 if [ "${RELENG_XORRISO}" == "" -o "${RELENG_DIR}" == "" -o "${RELENG_IMG}" == "" ]; then
  echo -e "\n${SELF}: xorriso_cmd IN_dir and OUT_image are required\n"
- exit 6
+ exit 2
 fi
 
-#if [ ! -x "${RELENG_XORRISO}" ]; then
-# printf "${SELF}: $RELENG_XORRISO not found or not an executable.\n"
-# exit 7
-#fi
-
-# data dir
-#if [ -d "${GEN_DATA_DIR}" ]; then
-# printf "\n${SELF}: directory %s exists!" ${GEN_DATA_DIR}
-# printf "\n${SELF}: use '${SELF} -cleanup' to remove.\n"
-# exit 8
-#else
-# mkdir "${GEN_DATA_DIR}"
-#fi
-
 # All must be set at this point
 printf "${SELF}: Config items:"
 printf "\n\txorriso_cmd=${RELENG_XORRISO}\n\tIN_dir=${RELENG_DIR}\n\tOUT_image=${RELENG_IMG}.iso"
@@ -147,11 +47,23 @@ if ! "${RELENG_XORRISO}" -version | grep libjte >/dev/null 2>&1; then
  printf "\n${SELF}: JTE not supported with this xorriso build. Install jigit >=1.18 and rebuild."
  printf "\n${SELF}: http://www.einval.com/~steve/software/JTE/\n"
  cleanup
- exit 9
+ exit 3
 fi
 
-# remove cruft from previous runs
-# rm -f ${RES}
+# check whether the binary support JTE
+set +e
+RETSTR_VER_JTE=`"${RELENG_XORRISO}" --version 2>/dev/null | grep -P "(libjte\s+in\s+use)"`
+RETCODE_VER_JTE="$?"
+set -e
+case ${RETCODE_VER_JTE} in
+     0)
+       printf "\n${SELF}: Found JTE support with ${RELENG_XORRISO} : ${RETSTR_VER_JTE}"
+       ;;
+     *)
+       printf "\n${SELF}: FAIL: Not found JTE support in ${RELENG_XORRISO}. Quit.\n"
+       exit 4
+       ;;
+esac
 
 # grab remote ISO image, to decompose
 if [ ! -f "${TMP_DATA_DIR}"/"${REMOTE_IMG}" ]; then
@@ -166,7 +78,7 @@ if [ ! -f "${TMP_DATA_DIR}"/"${REMOTE_IMG}" ]; then
      *)
       echo -e "\n${SELF}: FAIL: wget returned code: $WGET_RET\n"
       cleanup
-      exit 10
+      exit 5
      ;;
  esac
 else
@@ -177,7 +89,7 @@ fi
 if [ -d "${IMG_EXTRACT_DIR}" ]; then
  printf "\n${SELF}: Found ${IMG_EXTRACT_DIR}. Please cleanup.\n"
  cleanup
- exit 11
+ exit 6
 else
  mkdir "${IMG_EXTRACT_DIR}"
 fi
@@ -208,7 +120,7 @@ else
  printf "\n${SELF}: Not found: "${MKFS_MSDOS}". Install dosfstools."
  printf "\n${SELF}: http://www.daniel-baumann.ch/software/dosfstools/\n"
  cleanup
- exit 12
+ exit 7
 fi
 
 # GENERAL section
@@ -235,7 +147,7 @@ CMD+="\
 else
  printf "\n${SELF}: FAIL to compose the boot section.\n"
  cleanup
- exit 13
+ exit 8
 fi
 
 # JIGDO section
@@ -254,7 +166,7 @@ else
  printf "\n${SELF}: Not found: jigdo-gen-md5-list. Install jigit >= 1.18."
  printf "\n${SELF}: http://www.einval.com/~steve/software/JTE/\n"
  cleanup
- exit 14
+ exit 9
 fi
 
 CMD+="\
@@ -287,7 +199,7 @@ else
  printf "\n${SELF}: Not found: jigit-mkimage. Install jigit."
  printf "\n${SELF}: http://www.einval.com/~steve/software/JTE/\n"
  cleanup
- exit 15
+ exit 10
 fi
 
 # trap the exit code of diff and let the Universe explode