Update render_doIdentityImageDm.sh:
    
        - Fix verification of image (Img/) and tar.gz (Tgz/) directories.
          If they don't exist, then create them. There is no need to stop
          processing nor asking for creation (which is another way to stop
          processing). Both Img/ and Tgz/ directories are part of both GDM
          and KDM directory structures, so there might be no problem if we
          create them directly, specially if you want to save yourself
          some typing doing things that render_doIdentityImageDm.sh can do
          for you ;).