pregunta difícil,,,

Bueno,, paso a poner el script,, donde se verá las pocas modificaciones que yo le he hecho......para mí funciona (con un archivo),, --no lo he comprobado con más de uno a la vez-- yo lo tengo en la carpeta nautilus-script.....:

# Nombre: Fichero-a-Version--renombra (sh)
# ===================================================


#!/bin/bash
#Title=copy-file-as-backup
#Title[es]=renombra--copia-de-seguridad-versionitis--instantaneas

#==============================================================================
#                            copy-file-as-backup
#
#  author  : SLK
#  version : v2010121501
#  license : Distributed under the terms of GNU GPL version 2 or later
#
#==============================================================================
#
#  description :
#    nautilus-script :
#    creates a backup copy in the same directory, uses date and increments
#    number. keeps extension.
#
#  informations :
#    - a script for use (only) with Nautilus.
#    - to use, copy to your ${HOME}/.gnome2/nautilus-scripts/ directory.
#
#  WARNINGS :
#    - this script must be executable.
#    - package "zenity" must be installed  ???? zenity no lo veo que haga falta
#
#==============================================================================

#==============================================================================
#                                                                    CONSTANTES

# 0 or 1 ,,,,---> 1: no copia pero ves mensajes,,,,,---> 0: copia
DRY_RUN=0

#------>                                         cadenas usadas por zenity [es]
z_title='renombra'
z_no_object='ningun objeto seleccionado\nEXIT'

#==============================================================================
#                                                                INIT VARIABLES

# may depends of your system
BASENAME='/usr/bin/basename'
#CP='/bin/cp'   modificada por la siguiente linea
CP='/bin/mv'
DATE='/bin/date'
DIRNAME='/usr/bin/dirname'
GVFSMOUNT='/usr/bin/gvfs-mount'
GREP='/bin/grep'
LS='/bin/ls'
PERL='/usr/bin/perl'
ZENITY='/usr/bin/zenity'

#               ###  FORMAT OF THE FILE'S BACKUP  ###
#
#  2 parts : date (FMTBKP) and incremental digit (NB_DIGIT)
#   - FMTBKP : cf. man date    (ver opciones de date en manual)
#   - NB_DIGIT : number of digits (incremental for same date)
#
# it would copy /tmp/foo.pl to /tmp/foo~2001091101.pl

# configurado a mi gusto:
FMTBKP=`$DATE +-%d%b%Y-hm_%H%M-v` ; NB_DIGIT='1'


#==============================================================================
#                                                                          MAIN

[ -x "$ZENITY" ] || {
    echo "[ERROR] $ZENITY not found : EXIT"
    exit 1
}


### CHECK : is object selected ?

[ "$NAUTILUS_SCRIPT_SELECTED_URIS" == "" ] && {
    $ZENITY --error --title "$z_title" \
      --text="$z_no_object"
   
    exit 1
}

# retrieve the first object selected
uri_first_object=`echo -e "$NAUTILUS_SCRIPT_SELECTED_URIS" \
  | $PERL -ne 'print;exit'`


type_uri=`echo "$uri_first_object" \
  | $PERL -pe 's~^(.+?)://.+$~$1~'`

# try to get the full path of the uri (local path or gvfs mount ?)
if [ $type_uri == "file" ] ; then
   
    filepath_object=`echo "$uri_first_object" \
      | $PERL -pe '
        s~^file://~~;
        s~%([0-9A-Fa-f]{2})~chr(hex($1))~eg'`
   
elif [ $type_uri == "smb" -o $type_uri == "sftp" ] ; then
    if [ -x $GVFSMOUNT ] ; then
       
        # host (and share for smb) are matching a directory in ~/.gvfs/
       
        host_share_uri=`echo "$uri_first_object" \
          | $PERL -pe '
            s~^(smb://.+?/.+?/).*$~$1~;
            s~^(sftp://.+?/).*$~$1~;
            '`
       
        path_gvfs=`${GVFSMOUNT} -l  \
          | $GREP "$host_share_uri" \
          | $PERL -ne 'print/^.+?:\s(.+?)\s->.+$/'`
       
        # now let's create the local path
        path_uri=`echo "$uri_first_object" \
          | $PERL -pe '
            s~^smb://.+?/.+?/~~;
            s~^sftp://.+?/~~;
            s~%([0-9A-Fa-f]{2})~chr(hex($1))~eg'`
       
        filepath_object="${HOME}/.gvfs/${path_gvfs}/${path_uri}"
       
    else
        $ZENITY --error --title "$z_title" \
          --text="cannot acces to file - check gvfs\nEXIT"
       
        exit 1
    fi
else
    $ZENITY --error --title "$z_title" \
      --text="cannot acces to file - uri not known\nEXIT"
   
    exit 1
fi


### CHECK : is file ?

[ -f "$filepath_object" ] || {
    $ZENITY --error --title "$z_title" \
      --text="$filepath_object is not a file\nEXIT"
   
    exit 1
}

# retrieve infos
dirpath_object=`$DIRNAME "$filepath_object"`
filename_object=`$BASENAME "$filepath_object" | $PERL -pe 's/\.(tar\.gz|\w+)$//i'`
extension_object=`$BASENAME "$filepath_object"  | $PERL -ne '/(\.(tar\.gz|\w+))$/i&&print$1'`

# increment last digits if new name exists
filename_backup=`$LS "$dirpath_object" \
  | $PERL -lne '
    $[=1;
    /^'"$filename_object"''$FMTBKP'(\d+)'$extension_object'$/ && $s[($1+0)]++;
    END{
      for(@s){
        ($_&&++$i)||last
      }
      printf("'"$filename_object"''$FMTBKP'%0'$NB_DIGIT'd'$extension_object'",++$i)
    }'`

if [ $type_uri == "file" ] ; then
#    cmd_cp="$CP -p '$filepath_object' '$dirpath_object/$filename_backup'"     linea modificada, ver siguiente linea.
    cmd_cp="$CP '$filepath_object' '$dirpath_object/$filename_backup'"
else
    cmd_cp="$CP '$filepath_object' '$dirpath_object/$filename_backup'"
fi
### DRY RUN : noop

[ $DRY_RUN -eq 1 ] && {
    $ZENITY --info --title "$z_title" \
      --text="DRY RUN:
filepath_object:$filepath_object
dirpath_object:$dirpath_object
filename_object:$filename_object
extension_object:$extension_object
filename_backup:$filename_backup

COMMAND: $cmd_cp"
   
    exit 0
}

### GO : let's copy

eval "$cmd_cp"

[ $? -eq 0 ] || {
    $ZENITY --error --title "$z_title" \
    --text="ERROR
cp -p \"$filepath_object\" \"$dirpath_object/$filename_backup\""
   
    exit 1
}

exit 0

### EOF