Update 'Readme.md'

Readme.md

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 # apt-offline2bat.sh
 
-This script is used to creat an batch script for downloading all needed files and packages needed by **apt-offline**. The created batch script will need curl and zip to be installed on windows.
+This script is used to creat an batch script for downloading all needed files and packages needed by **apt-offline**. The created batch script will need curl and zip to be installed on windows. 
+
+As curl is mandatory for the script, zip is not. It is possible to edit the created batch script and delete the last four lines of the script. You can compress the files with the application of your choice.
+
+    zip ..\bundle.zip *
+    cd ..
+    del bundle\*.* /Q
+    rmdir bundle
 
 # Usage of apt-offline