diff --git a/install_all.sh b/install_odoo_code.sh
similarity index 54%
rename from install_all.sh
rename to install_odoo_code.sh
index 6b14728..41de86d 100755
--- a/install_all.sh
+++ b/install_odoo_code.sh
@@ -11,13 +11,24 @@ fi
 DESTDIR=/opt/odoo
 OPTIONS="-av --exclude-from=common_exclude_patterns.txt --chown odoo:odoo"
 
+Help ()
+{
+    echo "Usage: $0 [-h] -o={all|core|vendor|community|custom}"
+    echo
+    echo "Options:"
+    echo "-h    Help (display this text)"
+    echo "-o    Modules to be installed (one of 'all', 'core', 'vendor', 'community',"
+    echo "        'custom'). Required."
+    echo
+}
+
 cp_core ()
 {
     REPO="Odoo 14.0 core"
     SRC=./odoo/
     DEST=$DESTDIR/core/
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-    echo "Copy $REPO into production directory structure"
+    echo "Install $REPO into production directory structure"
     echo "  …from $SRC to $DEST"
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
     rsync $OPTIONS $SRC $DEST
@@ -29,7 +40,7 @@ cp_vendor ()
     SRC=./v14_avancys_agofer/
     DEST=$DESTDIR/vendor/
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-    echo "Copy $REPO into production directory structure"
+    echo "Install $REPO into production directory structure"
     echo "(selected modules)"
     echo "  …from $SRC to $DEST"
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
@@ -43,7 +54,7 @@ cp_custom ()
     SRC=./Extended/
     DEST=$DESTDIR/custom/
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-    echo "Copy $REPO into production directory structure"
+    echo "Install $REPO into production directory structure"
     echo "  …from $SRC to $DEST"
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
     rsync $OPTIONS $SRC $DEST
@@ -55,7 +66,7 @@ cp_community ()
     SRC=./Community/oca
     DEST=$DESTDIR/community/
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-    echo "Copy $REPO into production directory structure"
+    echo "Install $REPO into production directory structure"
     echo "(selected modules)"
     echo "  …from $SRC to $DEST"
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
@@ -64,8 +75,54 @@ cp_community ()
     done
 }
 
-cp_core      # Copy Odoo core
-cp_vendor    # Copy Avancys modules
-cp_custom    # Copy Custom modules
-cp_community # Copy OCA modules
+cp_all ()
+{
+    cp_core      # Install Odoo core
+    cp_vendor    # Install Avancys modules
+    cp_custom    # Install Custom modules
+    cp_community # Install OCA modules
+}
 
+if (($# == 0))
+then
+    Help
+    exit
+fi
+
+while getopts ":ho:" option; do
+   case $option in
+      h) # display Help
+         Help
+         exit;;
+      o) # Enter a name
+         Modules=$OPTARG;;         
+      *) # Invalid option
+         echo "Error: Invalid option"
+         echo
+         Help
+         exit;;
+   esac
+done
+
+case $Modules in
+    'all') # Install all modules
+        cp_all
+        exit;;
+    'core') # Install Odoo core 
+        cp_core
+        exit;;
+    'vendor') # Install Avancys modules
+        cp_vendor
+        exit;;
+    'community') # Install Custom modules
+        cp_community
+        exit;;
+    'custom') # Install OCA modules
+        cp_custom
+        exit;;
+    *) # Invalid option
+        echo "Error: Invalid module"
+        echo
+        Help
+        exit;;
+esac