diff --git a/create_arm_img_urpmi.sh b/create_arm_img_urpmi.sh
index f074ef3..2e18568 100755
--- a/create_arm_img_urpmi.sh
+++ b/create_arm_img_urpmi.sh
@@ -75,9 +75,10 @@ function help()
 }
 
 
-# cleaning
+# cleaning build space
 function clean()
 {
+	# Unmounting /dev /proc /sys in chroot  
 	title "Cleaning"
 	if ! [ -z "$(mountpoint -qd "$BUILD_PATH/dev")" ];then
 		info "Unmounting $BUILD_PATH/dev"
@@ -103,18 +104,21 @@ function clean()
 			exit 1
 		fi
 	fi
+	# Removing old Build directory
 	if [ -d "$BUILD_PATH" ];then
 		info "Removing $BUILD_PATH"
 		/bin/rm -Rf "$BUILD_PATH"
 	else
 		warning "$BUILD_PATH does not exists"
 	fi
+	# removing old image
 	if [ -e "$IMAGE" ];then
 		info "Removing $IMAGE"
 		/bin/rm -f "$INSTALL_PATH/$IMAGE"
 	else
 		warning "$IMAGE does not exists"
 	fi
+	# removing loop devices
 	for LOOP in $(ls /dev/loop*[0-9]p1)
 	do
 		X=${LOOP:0:10}
@@ -123,6 +127,7 @@ function clean()
 			partx -d "$X"
 		fi
 	done
+	# Removing boot and root directory
 	if [ -d "$BOOT" ];then
 		info "Removing $BOOT"
 		/bin/rmdir "$BOOT"
@@ -140,7 +145,6 @@ function clean()
 
 # creation of install path and copy of qemu ( installing it if not yet installed )
 
-
 function createchroot()
 {
 	title "Making chroot"
@@ -152,6 +156,7 @@ function createchroot()
 			exit 1
 		fi
 	fi
+	# Starting qemu service if not started
 	/bin/systemctl is-active systemd-binfmt.service
 	if  [ $? -ne 0 ]; then
 		title "Starting systemd-binfmt.service"
@@ -162,7 +167,7 @@ function createchroot()
 		fi
 	fi
 
-	
+	# Create Build path
 	if ! [ -d "$BUILD_PATH" ];then
 		warning "Build path does not exists, do you want i create it ? [Y|n] "
 		read yn
@@ -176,6 +181,9 @@ function createchroot()
 		else
 			exit 1
 		fi
+		info "Build path exists"
+	fi
+	#Copying qemu 
 	/bin/cp /bin/qemu-arm-static "$BUILD_PATH/usr/bin/"
 	if [ $? -ne 0 ];then
 		error "line $LINENO can't copy /bin/qemu-user-static to $BUILD_PATH/usr/bin/ : exiting"
@@ -188,6 +196,7 @@ function createchroot()
 	fi
 }
 
+# adding Mageia repositories
 function addmedia()
 {
 	title "Creating media $MIRROR"
@@ -229,7 +238,7 @@ function installbasesystem()
 	#	error "line $LINENO error installing basesystem-minimal  : exiting"
 	#	exit 1
 	#fi
-	/sbin/urpmi --urpmi-root "$BUILD_PATH"  --ignorearch --no-verify-rpm --auto --split-level 200 --split-length 200 urpmi locales-fr systemd
+	/sbin/urpmi --urpmi-root "$BUILD_PATH"  --ignorearch --no-verify-rpm --auto --split-level 200 --split-length 200 urpmi locales-fr systemd u-boot
 	if [ $? -ne 0 ];then
 		error "line $LINENO error installing urpmi or locales.fr : exiting"
 		exit 1
@@ -289,7 +298,6 @@ EOF" >>"$BUILD_PATH/second_stage_install.sh"
 	info "Copying skel in root directory"
 	/bin/rsync -a /etc/skel/ "$BUILD_PATH/root/"
 	
-	#configuration for target
 	
 	case $TARGET in
 		xu3|xu4)
@@ -427,7 +435,8 @@ p
 
 w
 EOF
-
+	
+	# Activate loop device
 	/sbin/losetup -d "$DEVICE"
 	DEVICE=$(/sbin/partx -va "$INSTALL_PATH/$IMAGE" | /bin/grep -m 1 -E -o '/dev/loop.?')
 	info "device $DEVICE"
@@ -497,16 +506,17 @@ UUID=$ROOT_UUID  /               ext4    defaults        0       0" > "$BUILD_PA
 	case $TARGET in
 		rpi)
 #			info "copying raspberry firmware in /boot"
-#			/bin/rsync -rlptDH "$FIRMWARE_PATH/firmware-stable/boot/" "$BOOT"
+#			/bin/rsync -rlptDH "$FIRMWARE_PATH/$FIRMWARE_DIR/boot/" "$BOOT"
 #TODO copy to bootstrap /boot
-			cp -a "$FIRMWARE_PATH/firmware-stable/boot/start*" "$BOOT"
-			cp -a "$FIRMWARE_PATH/firmware-stable/boot/fixup*" "$BOOT"
-			cp -a "$FIRMWARE_PATH/firmware-stable/extra/uname_string" "$BOOT"
-			cp -a "$FIRMWARE_PATH/firmware-stable/extra/uname_string7" "$BOOT"
+			cp -a "$FIRMWARE_PATH/$FIRMWARE_DIR/boot/start*" "$BOOT"
+			cp -a "$FIRMWARE_PATH/$FIRMWARE_DIR/boot/fixup*" "$BOOT"
+			#cp -a "$FIRMWARE_PATH/$FIRMWARE_DIR/extra/uname_string" "$BOOT"
+			#cp -a "$FIRMWARE_PATH/$FIRMWARE_DIR/extra/uname_string7" "$BOOT"
 			info "copying config.txt, boot.cmd and 10-vchiq-permissions.rules"
 			cp "$SOURCE_PATH/$CONFIG_PATH/config.txt" "$BOOT"
 			cp "$SOURCE_PATH/$CONFIG_PATH/boot.cmd" "$BOOT"
 			cp "$SOURCE_PATH/$CONFIG_PATH/10-vchiq-permissions.rules" "$BUILD_PATH/etc/udev/rules.d/"
+			# Making /etc/modules
 			echo "vchiq
 snd_bcm2835
 vc4
@@ -516,15 +526,17 @@ brcmfmac" >> "$BUILD_PATH"/etc/modules
 			/bin/cp -a "$SOURCE_PATH/$CONFIG_PATH/modprobe.conf" "$BUILD_PATH/etc/"
 			chown root:root "$BUILD_PATH/etc/modprobe.conf"
 	
-			info "making /boot/cmdline.txt"
-			echo "dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait fsck.repair=1" > "$BOOT/cmdline.txt"
+			#info "making /boot/cmdline.txt"
+			#echo "dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait fsck.repair=1" > "$BOOT/cmdline.txt"
 #			info "copying raspberry modules in /lib/modules"
-#			/bin/rsync -rlptDH "$FIRMWARE_PATH/firmware-stable/modules/" "$BUILD_PATH/lib/modules/"
+#			/bin/rsync -rlptDH "$FIRMWARE_PATH/$FIRMWARE_DIR/modules/" "$BUILD_PATH/lib/modules/"
 #			info "copying raspberry optionals files in opt"
-#			/bin/rsync -rlptDH "$FIRMWARE_PATH/firmware-stable/opt/" "$BUILD_PATH/opt/"
+#			/bin/rsync -rlptDH "$FIRMWARE_PATH/$FIRMWARE_DIR/opt/" "$BUILD_PATH/opt/"
  
-			info "copying wifi firmware file missing in Mageia"
-			/bin/mkdir -p "$ROOT/usr/lib/firmware/brcm/"
+			info "copying wifi firmware file missing in kernel-firmware-nonfree"
+			if ! [ -d "$ROOT/usr/lib/firmware/brcm/" ];then
+				/bin/mkdir -p "$ROOT/usr/lib/firmware/brcm/"
+			fi
 			/bin/cp "$SOURCE_PATH/$CONFIG_PATH/brcmfmac43430-sdio.txt" "$ROOT/usr/lib/firmware/brcm/"
 			if [ $? -ne 0 ];then
 				error "line $LINENO error copying wifi firmware in $ROOTP/usr/lib/firmware/brcm/ : exiting"
@@ -548,6 +560,7 @@ brcmfmac" >> "$BUILD_PATH"/etc/modules
 	/bin/mkdir "$ROOT/boot"
 
 	copyingcommon
+	# Syncing devices before unmounting
 	/usr/bin/sync
 	/usr/bin/umount "$BOOT" "$ROOT"
 	if [ $? -eq 0 ];then
@@ -679,7 +692,7 @@ ARM_VERSION="armv7hl"
 
 # path of config file
 if ! [ -d "$SOURCE_PATH/$CONFIG_PATH" ];then
-	info " Config path do not exists, defaulting to ./$TARGET"
+	info " Config path does not exists, defaulting to ./$TARGET"
 	CONFIG_PATH="$SOURCE_PATH/$TARGET"
 fi
 
@@ -707,7 +720,7 @@ else
 	fi
 fi
 
-# assign TARGET ( rpi, xu3 or xu4 )
+# assign function for building image of TARGET ( rpi, xu3 or xu4 )
 case $TARGET in
 xu3|xu4)
 	CREATEIMG="createxu3image"
@@ -729,11 +742,12 @@ info "Commande : $CMDNAME"
 info "Firmware path : $FIRMWARE_PATH"
 info "Firmware dir : $FIRMWARE_DIR"
 
-
+# Defining default image size to 7 go
 if [[ "$IMAGE_SIZE" -lt 7 ]] || [[ "$IMAGE_SIZE" -gt 128 ]];then
 	IMAGE_SIZE=7
 fi
 
+# change dir to install path and create it if not existing
 if [ "$OPT" != "clean" ];then
 	info "cd $INSTALL_PATH"
 	if ! [ -e "$INSTALL_PATH" ];then
@@ -750,14 +764,11 @@ if [ "$OPT" != "clean" ];then
 	fi
 fi
 
+#if no parameters then display help message
 if  [ -z $OPT ];then
 	OPT="--help"
 fi
 
-
-
-
-
 info "Image size is: $IMAGE_SIZE Go"
 
 case $OPT in
@@ -805,6 +816,7 @@ case $OPT in
 		;;
 esac
 
+
 if ! [ -z $ERRORN ];then
 	warning "Some errors occurs : $ERRORN errors"
 fi