diff --git a/libisoburn/trunk/releng/releng_isojigdo b/libisoburn/trunk/releng/releng_isojigdo
index fa1c00b7..b7ceefd5 100755
--- a/libisoburn/trunk/releng/releng_isojigdo
+++ b/libisoburn/trunk/releng/releng_isojigdo
@@ -33,6 +33,9 @@ Usage:
 # using a config file ${CONFFILE}
  ${SELF} -rc [-keep]
 
+# without using a config file
+ ${SELF} /path/to/xorriso
+
 # cleanup test generated data directory and exit
  ${SELF} -cleanup
 HLP
@@ -59,39 +62,54 @@ if [ "${1}" == "-cleanup" ]; then
 fi
 
 # help
-if [ ! "${1}" ]; then print_help && exit 3; fi
+if [ ! "${1}" ]; then
+ print_help && exit 3
 # config file
-if [ "${1}" == "-rc" ]; then
+elif [ "${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 ${CONFFILE} not found.\n" && exit 4
  fi
- if [ "${2}" == "-keep" ]; then KEEP=1; 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}" ]; then
+ RELENG_XORRISO="${1}"
 # the rest
 else
  print_help && exit 5
 fi
 
+#
+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
+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 '${SELF} -cleanup' to remove.\n"
- exit 6
+ exit 8
 else
  mkdir "${GEN_DATA_DIR}"
 fi
 
-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 7
-fi
 
-if [ ! -x "${RELENG_XORRISO}" ]; then
- printf "${SELF}: $RELENG_XORRISO not found or not an executable.\n"
- exit 8
-fi
 
 # all must be set at this point
 printf "${SELF}: Config items:"