diff --git a/debian/damaris-modules.postinst b/debian/damaris-modules.postinst
index d59b495..45a698b 100755
--- a/debian/damaris-modules.postinst
+++ b/debian/damaris-modules.postinst
@@ -1,8 +1 @@
-#! /bin/sh -e
-if grep -q nmr /etc/group; then
-     #DEBHELPER#
-     echo "group nmr already exists" ;
-else
-     echo "creating group nmr" ;
-     groupadd nmr || echo "failed!"
-fi
+addgroup --system nmr
diff --git a/debian/damaris-modules/etc/init.d/damaris-modules b/debian/damaris-modules/etc/init.d/damaris-modules
new file mode 100755
index 0000000..d11e754
--- /dev/null
+++ b/debian/damaris-modules/etc/init.d/damaris-modules
@@ -0,0 +1,165 @@
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:          damaris-backends
+# Required-Start:    $syslog $local_fs
+# Required-Stop:     $syslog $local_fs
+# Should-Start:      $syslog 
+# Should-Stop:       $syslog
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Startup script to load nmr hardware drivers for use with damaris backends
+# Description:       loads available nmr hardware drivers and grants rights to nmr group
+#                    these drivers will be typically used by damaris backends and accompanying programs
+### END INIT INFO
+
+# Script Author:        Achim Gaedke <achim.gaedke@physik.tu-darmstadt.de>
+# Created:              February 28th,  2005, adapted to LSB June 2008
+
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+. /lib/lsb/init-functions
+
+RETVAL=0
+# failure value for nonexisting hardware
+HARDWARE_FAIL_RETVAL=0
+
+NMR_MODULE_DIR=/lib/modules/`uname -r`/kernel/damaris
+NMR_GROUP="nmr"
+
+# tools
+RMMOD=/sbin/rmmod
+MODPROBE=/sbin/modprobe
+KERNELCONF=/boot/config-`uname -r`
+
+# spectrum related stuff
+SPECTRUM_NAME=spc
+CONFIG_SMP="`grep 'CONFIG_SMP *=' $KERNELCONF | sed 's/.*=//'`"
+if test "x$CONFIG_SMP" = "xy"; then
+  SPECTRUM_SMP_EXT="_smp";
+else
+  SPECTRUM_SMP_EXT="";
+fi
+SPECTRUM_DEV=/dev/${SPECTRUM_NAME}0
+SPECTRUM_MOD_FILE=$NMR_MODULE_DIR/${SPECTRUM_NAME}${SPECTRUM_SMP_EXT}.ko
+
+# pulseblaster related stuff
+PULSEBLASTER_NAME=pulseblaster
+PULSEBLASTER_MOD_FILE=$NMR_MODULE_DIR/$PULSEBLASTER_NAME.ko
+PULSEBLASTER_DEV=/dev/$PULSEBLASTER_NAME
+
+start() {
+
+        SPECTRUM_RETVAL=0
+        # find out whether spectrum module is running
+	if egrep "^spc${SPECTRUM_SMP_EXT} " /proc/modules >/dev/null ; then
+	     echo "spectrum module already loaded"
+	else
+	     # ok, load it
+             if test -f $SPECTRUM_MOD_FILE; then
+		if ! $MODPROBE ${SPECTRUM_NAME}${SPECTRUM_SMP_EXT} >/dev/null 2>&1; then
+		        echo "spectrum module failed to load"
+			SPECTRUM_RETVAL=1
+		fi
+	     else
+		echo "spectrum module not found"
+		SPECTRUM_RETVAL=1
+	     fi
+        fi
+
+        PULSEBLASTER_RETVAL=0
+        # find out whether pulseblaster module is running
+        if egrep "^pulseblaster " /proc/modules >/dev/null ; then
+	     echo "pulseblaster module already loaded"
+	else
+	     # ok, load it
+             if test -f $PULSEBLASTER_MOD_FILE; then
+		if ! $MODPROBE $PULSEBLASTER_NAME >/dev/null 2>&1; then
+			echo "pulseblaster module failed to load"
+			PULSEBLASTER_RETVAL=1
+		fi
+	     else
+		echo "pulseblaster module not found"
+		PULSEBLASTER_RETVAL=1
+	     fi
+        fi
+
+	# have to wait for a short time, let udev do the work
+	if [ -x /sbin/udevsettle ]; then
+	/sbin/udevsettle
+	fi
+	if [ -x /sbin/udevadm ]; then
+	/sbin/udevadm settle
+	fi
+	if ! test $PULSEBLASTER_RETVAL -ne 0 -o -c ${PULSEBLASTER_DEV}0 ; then
+		echo "no pulseblaster board is found, only the debug device at ${PULSEBLASTER_DEV}_debug is available"
+	fi
+
+	# with udev, we should have links and also the rights set correctly
+        if test  $PULSEBLASTER_RETVAL -ne 0  -o $SPECTRUM_RETVAL -ne 0; then
+             RETVAL=$HARDWARE_FAIL_RETVAL
+        fi
+
+}
+
+stop() {
+	if egrep "^spc$SPECTRUM_SMP_EXT " /proc/modules >/dev/null ; then
+	  # test wheter spectrum driver is still used
+	  # !!!! the usage counter of the spc kernel module is not maintained!!!!
+	  if test "`lsof $SPECTRUM_DEV`x" = "x"; then
+		$MODPROBE -r ${SPECTRUM_NAME}${SPECTRUM_SMP_EXT} || RETVAL=1
+	  else
+	        echo "spectrum driver still in use (use lsof)"
+                RETVAL=1
+	  fi
+	fi
+	if egrep "^${PULSEBLASTER_NAME} " /proc/modules > /dev/null ; then
+	  # test wheter it is still used
+	  $MODPROBE -r ${PULSEBLASTER_NAME} || RETVAL=1
+	fi
+	# have to wait for a short time, let udev do the work
+	if [ -x /sbin/udevsettle ]; then
+	/sbin/udevsettle
+	fi
+	if [ -x /sbin/udevadm ]; then
+	/sbin/udevadm settle
+	fi
+}
+
+status () {
+	if egrep "^${SPECTRUM_NAME}$SPECTRUM_SMP_EXT " /proc/modules > /dev/null ; then
+	   echo spectrum module loaded
+	else
+	   echo spectrum module not loaded
+           RETVAL=3
+	fi
+	if egrep "^${PULSEBLASTER_NAME} " /proc/modules > /dev/null ; then
+	   echo pulseblaster module loaded
+	else
+	   echo pulseblaster module not loaded
+           RETVAL=3
+	fi
+}
+
+
+case "$1" in
+        start)
+                start
+                ;;
+        stop)
+                stop
+                ;;
+        restart)
+                stop
+                start
+                ;;
+        force-reload)
+		stop
+		start
+		;;
+        status)
+                status
+                ;;
+        *)
+                printf "Usage: %s {start|stop|restart|status}\n" "$0"
+                RETVAL=1
+esac
+exit $RETVAL