diff --git a/vdi2raw2ewf b/vdi2raw2ewf
index 39995f6..867cf7c 100755
--- a/vdi2raw2ewf
+++ b/vdi2raw2ewf
@@ -1,18 +1,40 @@
 #!/usr/local/bin/bash
 
+# Usage:       ./vdi2raw2ewf
+#                or
+#              bash vdi2raw2ewf
+# Description: Convert VDI image to EWF image
+# Author:      Patrick Neumann (patrick@neumannsland.de)
+# Platform:    Apple macOS 10.13.6
+# Version:     1.00
+# Date:        2019-04-29
+# Link:        (work in progress)
+# License:     GPL3
+# Warranty:    This program is distributed WITHOUT ANY WARRANTY
+
+#=== CONFIGURATION (user) ======================================================
 PATH="/Users/neupat75/VirtualBox VMs"
 DSC="LinuxMint"
 VDI="${DSC}_19.1"
-RAW="${PATH}/${VDI}.raw"
 CASE="20190408-01"
 EVI="01"
 
+#=== CONFIGURATION (dynamic) ===================================================
+RAW="${PATH}/${VDI}.raw"
+
+
+#-------------------------------------------------------------------------------
+# Convert VDI to RAW image.
+#-------------------------------------------------------------------------------
 /usr/local/bin/vbox-img \
   convert \
   --srcfilename "${PATH}/${VDI}/${VDI}.vdi" \
   --dstfilename "${RAW}" \
   --dstformat RAW
 
+#-------------------------------------------------------------------------------
+# Acquire RAW as EWF image.
+#-------------------------------------------------------------------------------
 /usr/local/bin/ewfacquire \
   -c fast \
   -C "${CASE}" \
@@ -27,6 +49,9 @@ EVI="01"
   -u \
   "${RAW}"
 
+#-------------------------------------------------------------------------------
+# Delete RAW image.
+#-------------------------------------------------------------------------------
 /bin/rm "${RAW}"
 
 exit 0
\ No newline at end of file