diff --git a/home/lucifer/.local/share/nautilus/scripts/05c-Linux/02b-E01-RPi-kernel-version b/home/lucifer/.local/share/nautilus/scripts/05c-Linux/02b-E01-RPi-kernel-version
index 50e39c7..890ac71 100755
--- a/home/lucifer/.local/share/nautilus/scripts/05c-Linux/02b-E01-RPi-kernel-version
+++ b/home/lucifer/.local/share/nautilus/scripts/05c-Linux/02b-E01-RPi-kernel-version
@@ -114,24 +114,26 @@ readonly RPI_KERNEL_VERSION="${TMP}/RPi-kernel-version.txt"
 #-------------------------------------------------------------------------------
 # ...
 #-------------------------------------------------------------------------------
+if ! [ -f "${RPI_KERNEL_VERSION}" ] ; then
+  OFFSET="$( ${MMLS_BIN} "${SOURCE}" | ${AWK_BIN} '/0x0c/ { print $3; }' )"
+  readonly OFFSET="$(( 10#"${OFFSET}" ))" # without leading zeros!
 
-### TODO: add progress box!
+  ${FCAT_BIN} -o "${OFFSET}" kernel.img "${SOURCE}" > ./tmp/kernel.img
 
-OFFSET="$( ${MMLS_BIN} "${SOURCE}" | ${AWK_BIN} '/0x0c/ { print $3; }' )"
-readonly OFFSET="$(( 10#"${OFFSET}" ))" # without leading zeros!
+  readonly SKIP="$( ${BINWALK_BIN} ./tmp/kernel.img \
+                    | ${AWK_BIN} '/gzip compressed data/ { print $1; }' )"
 
-${FCAT_BIN} -o "${OFFSET}" kernel.img "${SOURCE}" > ./tmp/kernel.img
+  ${DD_BIN} if=./tmp/kernel.img bs=1 skip="${SKIP}" status=none \
+    | ${ZCAT_BIN} 2>/dev/null \
+    | ${STRINGS_BIN} \
+    | ${GREP_BIN} -F "Linux version" \
+    > "${RPI_KERNEL_VERSION}"
 
-readonly SKIP="$( ${BINWALK_BIN} ./tmp/kernel.img \
-                | ${AWK_BIN} '/gzip compressed data/ { print $1; }' )"
-
-${DD_BIN} if=./tmp/kernel.img bs=1 skip="${SKIP}" status=none \
-  | ${ZCAT_BIN} 2>/dev/null \
-  | ${STRINGS_BIN} \
-  | ${GREP_BIN} -F "Linux version" \
-  > "${RPI_KERNEL_VERSION}"
-
-${RM_BIN} ./tmp/kernel.img
+  ${RM_BIN} ./tmp/kernel.img
+fi | ${ZENITY_BIN} --progress \
+                    --title="kernel version" \
+                    --text="Please wait..." \
+                    --pulsate
 
 #-------------------------------------------------------------------------------
 # Display content of the resultfile "RPi-CPU-version.txt".
diff --git a/home/lucifer/.local/share/nautilus/scripts/06-Qemu/01-cdrom b/home/lucifer/.local/share/nautilus/scripts/06-Qemu/01-cdrom
index 2072d62..8f33eec 100755
--- a/home/lucifer/.local/share/nautilus/scripts/06-Qemu/01-cdrom
+++ b/home/lucifer/.local/share/nautilus/scripts/06-Qemu/01-cdrom
@@ -144,7 +144,7 @@ ${GTERMINAL_BIN} --execute \
     -cpu host \
     -smp 1,cores=1 \
     -m 3072 \
-    -usbdevice tablet \
+    -usb -device usb-tablet \
     -vga std \
     -net none \
     -boot once=d \
diff --git a/home/lucifer/Hackintosh/OVMF-X64-r15214.fd b/home/lucifer/Hackintosh/OVMF-X64-r15214.fd
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index beb21c0..0000000
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diff --git a/home/lucifer/Hackintosh/OVMF_VARS-1024x768.fd b/home/lucifer/Hackintosh/OVMF_VARS-1024x768.fd
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diff --git a/home/lucifer/Pictures/Screenshots/boot-bios-BOOTCAMP.png b/home/lucifer/Pictures/Screenshots/boot-bios-BOOTCAMP.png
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diff --git a/home/lucifer/Pictures/Screenshots/boot-bios-options.png b/home/lucifer/Pictures/Screenshots/boot-bios-options.png
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diff --git a/home/lucifer/Pictures/Screenshots/boot-cdrom-grml.png b/home/lucifer/Pictures/Screenshots/boot-cdrom-grml.png
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diff --git a/home/lucifer/Pictures/Screenshots/boot-cdrom-select-grml.png b/home/lucifer/Pictures/Screenshots/boot-cdrom-select-grml.png
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diff --git a/home/lucifer/Pictures/Screenshots/boot-macos-catalina.png b/home/lucifer/Pictures/Screenshots/boot-macos-catalina.png
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diff --git a/home/lucifer/Pictures/Screenshots/boot-macos-snow-leopard.png b/home/lucifer/Pictures/Screenshots/boot-macos-snow-leopard.png
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diff --git a/home/lucifer/Pictures/Screenshots/boot-rpi-with-cli-only.png b/home/lucifer/Pictures/Screenshots/boot-rpi-with-cli-only.png
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diff --git a/home/lucifer/Pictures/Screenshots/boot-rpi-with-gui.png b/home/lucifer/Pictures/Screenshots/boot-rpi-with-gui.png
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diff --git a/home/lucifer/Pictures/Screenshots/boot-uefi-win10ee-qxl.png b/home/lucifer/Pictures/Screenshots/boot-uefi-win10ee-qxl.png
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diff --git a/home/lucifer/Pictures/Screenshots/rpi-choose-arch.png b/home/lucifer/Pictures/Screenshots/rpi-choose-arch.png
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diff --git a/home/lucifer/Pictures/Screenshots/rpi-choose-kernel-version.png b/home/lucifer/Pictures/Screenshots/rpi-choose-kernel-version.png
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