diff --git a/check_permissions.sh b/check_permissions.sh
new file mode 100755
index 0000000..43c4d3a
--- /dev/null
+++ b/check_permissions.sh
@@ -0,0 +1,98 @@
+#!/bin/bash
+#
+# Script checking the right permissions for software installations:
+# Ordinary files must at least have permissions 664 and directories 755.
+# 
+# Christoph Niethammer <christoph.niethammer@web.de> (C) 2011
+#
+
+declare -r APP_NAME="${0##*/}"
+declare -r  VERSION="0.8"
+declare SEARCH_DIRS=
+declare     VERBOSE=0
+declare PRINT_FILES=0
+declare  PRINT_DIRS=0
+declare -r FILE_PERMS="! -perm -664"
+declare -r  DIR_PERMS="! -perm 775"
+
+
+function print_usage {
+
+binary=`basename $0`
+cat <<EOF
+${APP_NAME}: (${VERSION})
+
+Copyright (C) 2010-2011 Christoph Niethammer <christoph.niethammer@web.de>
+
+Usage: $APP_NAME DIR
+
+  -h, --help       Print this usage
+  -v, --verbose    Be more verbose (print list of found directories and files)
+
+Checks permissions in the given directories. Permissions for files must be 
+at least set to 664 and for directories must be exactly 775.
+
+EOF
+}
+
+function die {
+	echo $1
+	exit 1
+}
+
+if [ $# -lt 1 ]; then
+	print_usage
+    exit 0
+fi
+
+for arg in $@; do 
+	case $arg in
+        --help|-h)
+            print_usage
+            exit 0
+            ;;
+	    --verbose|-v)
+            VERBOSE=1
+		    PRINT_FILES=1
+		    PRINT_DIRS=1
+            ;;
+        *)
+	        if [[ ! -d $arg ]]; then
+		        echo "# Skipped	$arg"
+		    continue
+	        fi
+	        SEARCH_DIRS+="${IFS}${arg}"
+	        #echo "# Added	$arg"
+            ;;
+    esac
+done
+
+echo "# Searching for directories which do not match '$DIR_PERMS' ..." 
+WRONG_DIRS=(`find $SEARCH_DIRS -type d $DIR_PERMS -print`)
+echo "# Searching for files which do not match '$FILE_PERMS' ..." 
+WRONG_FILES=(`find $SEARCH_DIRS -type f $FILE_PERMS -print`)
+
+
+if [[ $PRINT_FILES -eq 1 ]]; then
+echo "# ** directories with wrong permissions:"
+for dir in ${WRONG_DIRS[@]}; do
+    echo $dir
+done
+
+echo "# ** files with wrong permissions:"
+for file in ${WRONG_FILES[@]}; do
+    echo $file
+done
+fi
+
+echo "#"
+echo "# ------------------------------"
+echo "# Summary:"
+echo "#   directories with wrong permissions:  ${#WRONG_DIRS[@]}"
+echo "#   files with wrong permissions:        ${#WRONG_FILES[@]}"
+echo "# ------------------------------"
+echo "#"
+
+# clean up temporary files
+#rm $WRONG_DIR_FILE
+#rm $WRONG_FILES_FILE
diff --git a/install_toolchain.sh b/install_toolchain.sh
index ec5130b..8f86655 100755
--- a/install_toolchain.sh
+++ b/install_toolchain.sh
@@ -13,7 +13,8 @@ echo $SIT_DIR
 export SRC_POOL=${HOME}/src
 export WORKDIR_BASE=${HOME}/work
 
-PREFIX=$HOME/bin/local
+#PREFIX=$HOME/bin/local
+PREFIX=/opt/amtopt/autotools/local
 MAKEOPTS="-j4"
 
 
@@ -105,6 +106,8 @@ P=autoconf-${AUTOCONF_VERSION}
 A=${P}.tar.gz
 sit_auto_install
 
+export PATH=$PREFIX/bin:$PATH
+export LD_LIBRARY_PATH=$PREFIX/lib:$LD_LIBRARY_PATH
 # install automake
 P=automake-${AUTOMAKE_VERSION}
 A=${P}.tar.bz2