diff --git a/src/rootfsinstall.sh b/src/rootfsinstall.sh
index 1cd31c5..646819a 100755
--- a/src/rootfsinstall.sh
+++ b/src/rootfsinstall.sh
@@ -20,7 +20,7 @@ function usage() {
    echo "-rpi        : make a RaspberryPi image with boot partition"
    echo
    echo "Options:"
-   echo "-a archive  : additional archive to unpack in rootfs root"
+   echo "-a archive  : additional archive to unpack in rootfs root (may be specified multiple times)"
    echo "-cp command : command to run before chroot (may be specified multiple times)"
    echo "              Use @ROOT@ as reference to rootfs path and @BOOT@ as reference to bootfs path"
    echo "-c command  : command to run through chroot in rootfs (may be specified multiple times)"
@@ -29,13 +29,15 @@ function usage() {
    echo "-k kernel   : extract and use specified kernel file from ROOTFS/boot/ for boot"
    echo "-k2 kernel  : extract and use specified second kernel file from ROOTFS/boot/ for boot"
    echo "-i packages : install packages using package manager in chroot"
+   echo "-I          : treat input as an image file"
    echo "-l          : force local installation only; don't perform installation from network"
    echo "-L          : rootfs volume label (default: 'openmamba')"
    echo "-p password : set given password for root user"
    echo "-r mode     : set given default video mode where applicable (e.g. -r 1920x1080-32@60)"
    echo "-y          : assume yes to all questions (script mode)"
    echo
-   echo "Example: $0 /dev/sdb /tmp/openmamba-rootfs-light.arm.tar.xz"
+   echo "Example 1: $0 /dev/sdb /tmp/openmamba-rootfs-light.arm.tar.xz"
+   echo "Example 2: $0 /dev/sdb -rpi /tmp/openmamba-diskimg-raspberrypi-it-snapshot-20170910.arm.img.gz"
    exit 1
 }
 
@@ -112,6 +114,7 @@ while [ "$1" ]; do
            INSTALLPACKAGES="$2"
            shift
            ;;
+      -I) IMAGEMODE=1 ;;
       -l) LOCALONLY=1 ;;
       -L) [ "$2" ] || {
               echo "Error: -L option requires a volume label as argument; aborting."
@@ -236,59 +239,69 @@ echo
    [ "$ans" = "y" -o "$ans" = "Y" ] || exit 0
 }
 
-sudo parted -s ${DRIVE} mktable msdos
-if [ "$?" != "0" ]; then
-   echo "ERROR: parted exited with error $? while creating partition table on ${DRIVE}; aborting."
-fi
-sync
+if [ ! "$IMAGEMODE" ]; then
+   sudo parted -s ${DRIVE} mktable msdos
+   if [ "$?" != "0" ]; then
+      echo "ERROR: parted exited with error $? while creating partition table on ${DRIVE}; aborting."
+   fi
+   sync
 
-if [ "$BOOTFSTYPE" ]; then
-   # FAT partition
-   sudo parted -s -a cyl -- ${DRIVE} mkpart primary $BOOTFSTYPE $BOOTFSSTART $BOOTFSSIZE
-   if [ "$?" != "0" ]; then
-      echo "ERROR: parted exited with error $? while creating boot partition on ${DRIVE}; aborting."
+   if [ "$BOOTFSTYPE" ]; then
+      # FAT partition
+      sudo parted -s -a cyl -- ${DRIVE} mkpart primary $BOOTFSTYPE $BOOTFSSTART $BOOTFSSIZE
+      if [ "$?" != "0" ]; then
+         echo "ERROR: parted exited with error $? while creating boot partition on ${DRIVE}; aborting."
+      fi
+      sudo parted -s -- ${DRIVE} toggle 1 boot
+      if [ "$?" != "0" ]; then
+         echo "ERROR: parted exited with error $? while setting boot flag on ${DRIVE} boot partition; aborting."
+      fi
+      # rootfs partition
+      sudo parted -s -a cyl -- ${DRIVE} mkpart primary $SYSTEMFSTYPE $BOOTFSSIZE -1
+      if [ "$?" != "0" ]; then
+         echo "ERROR: parted exited with error $? while creating system partition on ${DRIVE}; aborting."
+      fi
+   else
+      # rootfs partition
+      sudo parted -s -a cyl -- ${DRIVE} mkpart primary $SYSTEMFSTYPE 0 -1
+      if [ "$?" != "0" ]; then
+         echo "ERROR: parted exited with error $? while creating system partition on ${DRIVE}; aborting."
+      fi
    fi
-   sudo parted -s -- ${DRIVE} toggle 1 boot
-   if [ "$?" != "0" ]; then
-      echo "ERROR: parted exited with error $? while setting boot flag on ${DRIVE} boot partition; aborting."
-   fi
-   # rootfs partition
-   sudo parted -s -a cyl -- ${DRIVE} mkpart primary $SYSTEMFSTYPE $BOOTFSSIZE -1
-   if [ "$?" != "0" ]; then
-      echo "ERROR: parted exited with error $? while creating system partition on ${DRIVE}; aborting."
+
+   if [ "$BOOTFSTYPE" ]; then
+      echo "Formatting $PARTITION1 ($BOOTFSTYPE) ..."
+      case "$BOOTFSTYPE" in
+         vfat|fat32) mkfs.vfat -s 1 -F 32 -n "boot" $PARTITION1 || {
+                  echo "ERROR: unable to format $PARTITION1; aborting."
+                  exit 1
+               } ;;
+         fat16) mkfs.vfat -s 1 -F 16 -n "boot" $PARTITION1 || {
+                  echo "ERROR: unable to format $PARTITION1; aborting."
+                  exit 1
+               } ;;
+         ext*) mke2fs -q -t $BOOTFSTYPE -j -L "boot" $PARTITION1 || {
+                  echo "ERROR: unable to format $PARTITION1; aborting."
+                  exit 1
+               } ;;
+      esac
    fi
+
+   echo "Formatting $PARTITION2 ($SYSTEMFSTYPE)..."
+   mke2fs -q -F -t $SYSTEMFSTYPE -j -L "$VOLUME_LABEL" $PARTITION2 || {
+      echo "ERROR: unable to format $PARTITION2; aborting."
+      exit 1
+   }
+
 else
-   # rootfs partition
-   sudo parted -s -a cyl -- ${DRIVE} mkpart primary $SYSTEMFSTYPE 0 -1
-   if [ "$?" != "0" ]; then
-      echo "ERROR: parted exited with error $? while creating system partition on ${DRIVE}; aborting."
-   fi
+   # Image mode
+   gunzip -c ${ROOTFSARCHIVE} | dd of=${DRIVE} bs=32M
+   # Grow system partition to 100%
+   parted ${DRIVE} resizepart 2 100%
+   e2fsck -f ${PARTITION2}
+   resize2fs ${PARTITION2}
 fi
 
-if [ "$BOOTFSTYPE" ]; then
-   echo "Formatting $PARTITION1 ($BOOTFSTYPE) ..."
-   case "$BOOTFSTYPE" in
-      vfat|fat32) mkfs.vfat -s 1 -F 32 -n "boot" $PARTITION1 || {
-               echo "ERROR: unable to format $PARTITION1; aborting."
-               exit 1
-            } ;;
-      fat16) mkfs.vfat -s 1 -F 16 -n "boot" $PARTITION1 || {
-               echo "ERROR: unable to format $PARTITION1; aborting."
-               exit 1
-            } ;;
-      ext*) mke2fs -q -t $BOOTFSTYPE -j -L "boot" $PARTITION1 || {
-               echo "ERROR: unable to format $PARTITION1; aborting."
-               exit 1
-            } ;;
-   esac
-fi
-
-echo "Formatting $PARTITION2 ($SYSTEMFSTYPE)..."
-mke2fs -q -F -t $SYSTEMFSTYPE -j -L "$VOLUME_LABEL" $PARTITION2 || {
-   echo "ERROR: unable to format $PARTITION2; aborting."
-   exit 1
-}
-
 [ "$BOOTFSTYPE" ] && BOOTMP=`mktemp -d -t rootfsinstall.XXXXXXXX`
 ROOTMP=`mktemp -d -t rootfsinstall.XXXXXXXX`
 
@@ -318,14 +331,17 @@ fi
       exit 1
    }
 
-   echo "Uncompressing $ROOTFSARCHIVE..."
-   echo -n "This can take a while, please wait..."
-   tar xf $ROOTFSARCHIVE || {
-      echo
-      echo "ERROR: unable to uncompress rootfs archive; aborting."
-      exit 1
-   }
-   echo "DONE"
+   if [ ! "${IMAGEMODE}" ]; then
+      echo "Uncompressing $ROOTFSARCHIVE..."
+      echo -n "This can take a while, please wait..."
+      tar xf $ROOTFSARCHIVE || {
+         echo
+         echo "ERROR: unable to uncompress rootfs archive; aborting."
+         exit 1
+      }
+      echo "DONE"
+   fi
+
    for b in dev dev/pts proc sys run; do
       mount -o bind /$b $ROOTMP/$b
    done
@@ -364,7 +380,7 @@ if [ "$SETHOSTNAME" ]; then
    sed -i "s|\(127\.0\.0\.1\W*\)\(.*\)|\1 $SETHOSTNAME.localdomain $SETHOSTNAME localhost.localdomain localhost|" $ROOTMP/etc/hosts
 fi
 
-if [ "$INSTALLPACKAGES" -a "$LOCALONLY" != "1" ]; then
+if [ "$INSTALLPACKAGES" -a "$LOCALONLY" != "1" -a ! "${IMAGEMODE}" ]; then
    mv $ROOTMP/etc/resolv.conf $ROOTMP/etc/resolv.conf.rootfsinstall
    cp /etc/resolv.conf $ROOTMP/etc/resolv.conf
    chroot $ROOTMP bash -c /etc/profile.d/gpg-key-openmamba.sh
@@ -381,7 +397,7 @@ if [ "$INSTALLPACKAGES" -a "$LOCALONLY" != "1" ]; then
    mv $ROOTMP/etc/resolv.conf.rootfsinstall $ROOTMP/etc/resolv.conf
 fi
 
-if [ "$REMOVEPACKAGES" ]; then
+if [ "$REMOVEPACKAGES" -a ! "${IMAGEMODE}" ]; then
    chroot $ROOTMP smart remove -y $REMOVEPACKAGES 2>/dev/null || true
 fi
 
@@ -391,6 +407,7 @@ KERNELDEST2=`echo $KERNELDEST2 | sed "s|@BOOT@|$BOOTMP|g"`
 #
 # Prepare boot partition
 #
+if [ ! "${IMAGEMODE}" ]; then
 if [ "$TARGETDEVICE" = "baytrail" ]; then
    # create EFI Grub 64 bit image
    mkdir -p $BOOTMP/EFI/BOOT/
@@ -561,6 +578,8 @@ if [ "$USEKERNEL" ]; then
    fi
 fi
 
+fi # ! IMAGEMODE
+
 #
 # Final custom commands
 #