diff --git a/vm-start.sh b/vm-start.sh
index 8e81204..af869d5 100755
--- a/vm-start.sh
+++ b/vm-start.sh
@@ -3,8 +3,9 @@
 
 #RESULT_POSSIBLE=("init","start","start-backup","create","backup","restore","suppr")
 
+# Constante d'éxecutions.
 VERSION=0.6
-USAGE="vm-start NAME COMMAND [PARAMETER] [OPTION]
+USAGE="vm-start [ NAME COMMAND [PARAMETER] ] [OPTION]
 
 Script to manage virtual machine easily.
 
@@ -27,12 +28,12 @@ PARAMETTER available
     -v, --version       Print the version of this program and quit
 
 OPTION available
-    NPROC=<nb proc>     Def the number of proc of the vm
-    MEMORY=<mem>        Def the qty of memory allocated to the vm
-    SIZE=<size>         Def the size that should be allocated by create
-    UEFI=<uefi>         Select if there will be an UEFI by default.
+    nproc=<nb proc>     Def the number of proc of the vm
+    memory=<mem>        Def the qty of memory allocated to the vm
+    size=<size>         Def the size that should be allocated by create
+    uefi                Select if there will be an UEFI by default.
                         can be either set or unset. By default is unset.
-    OPTIONS=<option>    additinal options to give to qemu. By default is
+    options=<option>    additinal options to give to qemu. By default is
                         -display gtk -vga qxl
 "
 MAIN_LOCATION="$HOME/virtual_machine/"
@@ -44,7 +45,12 @@ OPTION="-display gtk \
         #-display sdl
         #-usbdevice tablet \
 
-mkdir -p $MAIN_LOCATION
+
+
+HELP() {
+    echo "$USAGE"
+    exit 0
+}
 
 INIT() {
     echo "INIT for vm $1"
@@ -180,21 +186,70 @@ SUPPRESS() {
     fi
 }
 
+
+
+# gère les paramètres
+
+for i in $@;
+do
+    if [ "$i" == "-h" ] || [ "$i" == "--help" ]
+    then
+        HELP
+    elif [ "$i" == "-v" ] || [ "$i" == "--version" ]
+    then
+        echo "vm-start ${VERSION}"
+        exit 0
+    fi
+done
+
+
+# verifie au moins assez d'options pour utiliser le programme.
+
 if [ $# -lt 2 ]
 then
     echo "Error, not enough args"
-    echo "${USAGE}"
-    exit 1
+    HELP
 fi
 
+# vérifie que le dossier pour stocker les vms existe & change le dossier actif pour qu'il soit cellui du lanceur.
+
+mkdir -p $MAIN_LOCATION
 cd "$( dirname "$( readlink -f "$0" )" )"
 
-if [[ ! -f conf/$1-vm_var.sh ]]
+# Véréfie qu'il y ait bien un fichier de config pour la vm que l'on tente de démarer dans la cas contraire en génére un.
+# possibilitée de générer à nouveau le fichier de config avec vm-start nom-vm init
+
+if [ "$2" == "init" ]
 then
     INIT $1
+elif [[ ! -f conf/$1-vm_var.sh ]]
+then
+    echo "no config file found. creating one in conf/${1}-vm_var.sh"
+    INIT $1
 fi
 
-source conf/$1-vm_var.sh
+#Vérifie si l'option UEFI est set dans le fichier de config. Si oui l'ajoutte aux options.
+#TODO l'ajoutter au detecteur d'options.
+
+. conf/$1-vm_var.sh
+
+for (( i=3; i<=$#; i++)); do
+    if [ "${!i%=*}" == "nproc" ]
+    then
+        NPROC="${!i#*=}"
+    elif [ "${!i%=*}" == "memory" ]
+    then
+        MEMORY="${!i#*=}"
+    elif [ "${!i%=*}" == "uefi" ]
+    then
+        unset UEFI
+        OPTION="$OPTION \
+            -drive if=pflash,format=raw,readonly=on,file=/usr/share/edk2/x64/OVMF_CODE.4m.fd \
+            -drive if=pflash,format=raw,file=${MAIN_LOCATION}${LOCATION}OVMF_VARS.4m.fd"
+    fi
+done
+
+
 if [ -n "${UEFI+x}" ]
 then
     OPTION="$OPTION \
@@ -233,10 +288,8 @@ elif [[ $2 == "suppr" ]]
 then
     echo "suppressing all data of the vm $1"
     SUPPRESS
-elif [[ "$2" == "version" ]]
-then
-    echo "script lancement vm version v.$VERSION"
 else
     echo "commande $2 inconnue"
+    HELP
 fi