diff --git a/lib/install.sh b/lib/install.sh
index ca661f3..9f43e29 100755
--- a/lib/install.sh
+++ b/lib/install.sh
@@ -32,7 +32,7 @@ function prepare_lxd {
         echo "define lxd and assign to user <$USER>"
         sudo groupadd --force "$NEW_GROUP"
         sudo usermod --append --groups "$NEW_GROUP" "$(whoami)"
-        exec sg "$NEW_GROUP" "exec '$0' $(printf "'%s' " SESSION_RELOAD_REQUIRED "$@")"
+        exec sg "$NEW_GROUP" exec "$0 $TARGET SESSION_RELOAD_REQUIRED $@"
         # no further processing because exec has been called!
     else
         echo "user <$USER> already belongs to group <lxd>!"
@@ -40,75 +40,65 @@ function prepare_lxd {
 
     sudo /opt/miaou-bash/tools/idem_apt_install lxd btrfs-progs
 
+    override_lxd_service
+
     # test lxdbr0
     if ! lxc network info lxdbr0 &>/dev/null; then
+
         echo "bridge <lxdbr0> down, so initialization will use default preseed..."
-        sudo lxd init
-        #         cat <<EOF | sudo lxd init --preseed
-
-        # NEW
-        # networks:
-        # - config:
-        #     ipv4.address: auto
-        #     ipv6.address: none
-        #   description: ""
-        #   name: lxdbr0
-        #   type: ""
-        #   project: default
-        # storage_pools:
-        # - config:
-        #     source: /dev/sda4
-        #   description: ""
-        #   name: default
-        #   driver: btrfs
-        # profiles:
-        # - config: {}
-        #   description: ""
-        #   devices:
-        #     eth0:
-        #       name: eth0
-        #       network: lxdbr0
-        #       type: nic
-        #     root:
-        #       path: /
-        #       pool: default
-        #       type: disk
-        #   name: default
-        # projects: []
-        # cluster: null
-
-        # OLD
-        # networks:
-        # - config:
-        #     ipv4.address: auto
-        #     ipv6.address: none
-        #   description: ""
-        #   name: lxdbr0
-        #   type: ""
-        #   project: default
-        # storage_pools:
-        # - config:
-        #     source: /dev/sda4
-        #   description: ""
-        #   name: default
-        #   driver: btrfs
-        # profiles:
-        # - config: {}
-        #   description: ""
-        #   devices:
-        #     eth0:
-        #       name: eth0
-        #       network: lxdbr0
-        #       type: nic
-        #     root:
-        #       path: /
-        #       pool: default
-        #       type: disk
-        #   name: default
-        # projects: []
-        # cluster: null
-
-        echo OK
+
+        empty_block_partition=''
+        if lsblk -o NAME,FSTYPE,GROUP --noheadings -p | grep -E ^.─ | grep disk; then
+            # FIXME: when nesting no DISK type partition found!
+            empty_block_partition=$(lsblk -o NAME,FSTYPE,GROUP --noheadings -p | grep -E ^.─ | grep disk | awk '{if($3=="") print $1}' | cut -d'/' -f3)
+        fi
+        if [[ -n "$empty_block_partition" ]]; then
+            echo "use empty block partition /dev/$empty_block_partition"
+            cat <<EOF | sudo lxd init --preseed
+config: {}
+networks:
+- config:
+    ipv4.address: auto
+    ipv6.address: none
+  description: ""
+  name: lxdbr0
+  type: ""
+  project: default
+storage_pools:
+- config:
+    source: /dev/$empty_block_partition
+  description: ""
+  name: default
+  driver: btrfs
+profiles:
+- config: {}
+  description: ""
+  devices:
+    eth0:
+      name: eth0
+      network: lxdbr0
+      type: nic
+    root:
+      path: /
+      pool: default
+      type: disk
+  name: default
+projects: []
+cluster: null
+EOF
+            echo OK
+        else
+            echo "use dir partition"
+            cat <<EOF | lxd init --preseed
+config: {}
+networks:
+- name: lxdbr0
+  type: bridge
+  config:
+    ipv4.address: auto
+    ipv6.address: none
+EOF
+        fi
     else
         echo "bridge <lxdbr0> found implies it has been already initialized!"
     fi
@@ -118,7 +108,8 @@ function prepare_lxd {
     set_alias 'll' 'list -c ns4mDN'
 
     # test environment container hostname
-    local env_container_hostname=$(lxc profile get default environment.container_hostname)
+    local env_container_hostname
+    env_container_hostname=$(lxc profile get default environment.container_hostname)
     if [[ -z "$env_container_hostname" ]]; then
         env_container_hostname=$(hostname -s)
         if env | grep -q container_hostname; then
@@ -137,12 +128,6 @@ function prepare_lxd {
         echo -n "subuid, subgid allowing <$(whoami)> ..."
         printf "root:$(id -u):1\n" | sudo tee -a /etc/subuid /etc/subgid
         PREFIX="" echoinfo DONE
-
-        # root:1000:1
-        # root:100000:65536
-        # _lxd:100000:65536
-        # <USER>:100000:65536
-
     else
         echo "subuid, subgid allowing <$(whoami)> already done!"
     fi
@@ -156,8 +141,8 @@ function prepare_lxd {
     fi
 
     if [[ ! -d "$HOME/LXD/BACKUP" ]]; then
-        echo -n "$HOME/LXD/SHARED creating ... "
-        mkdir "$HOME/LXD/SHARED" -p
+        echo -n "$HOME/LXD/BACKUP creating ... "
+        mkdir "$HOME/LXD/BACKUP" -p
         PREFIX="" echoinfo DONE
     else
         echo "folder <$HOME/LXD/BACKUP> already created!"
@@ -169,11 +154,11 @@ function set_alias {
     local name="$1"
     local command="$2"
     if ! lxc alias list -f csv | grep -q "^$name,"; then
-        echo -n "define lxc alias $name ..."
+        echo -n "defining new lxc alias <$name> ..."
         lxc alias add "$name" "$command"
         PREFIX="" echoinfo OK
     else
-        echo "lxc alias "$name" already defined!"
+        echo "lxc alias <$name> already defined!"
     fi
 
 }
@@ -329,7 +314,7 @@ function extra_dev_desktop {
     :
 }
 
-function override_lxd_service_to_reload_nftables {
+function override_lxd_service {
     local PREFIX="lxd:override"
 
     if [[ ! -d /etc/systemd/system/lxd.service.d ]]; then
@@ -338,8 +323,10 @@ function override_lxd_service_to_reload_nftables {
         cat <<EOF | sudo tee /etc/systemd/system/lxd.service.d/override.conf
 [Service]                                                                                                                                                                        
 ExecStartPost=systemctl reload nftables.service
+Environment=LANGUAGE=en:en_US
 EOF
         sudo systemctl daemon-reload
+        sudo systemctl restart lxd.service
         PREFIX="" echo "OK"
     else
         echo "lxd service already overridden!"
@@ -357,9 +344,23 @@ function ask_for_credential {
     echo "successfully checked!"
 }
 
+function preload_bookworm_image {
+    local PREFIX="preload:bookworm"
+
+    if [[ $(lxc image list debian/12/cloud -f csv | wc -l) -lt 1 ]]; then
+        echo -n "downloading images from publc remote, please hold on..."
+        lxc image copy images:debian/12/cloud local: --copy-aliases --quiet
+        PREFIX="" echoinfo OK
+    else
+        echo -n "refreshing images from publc remote..."
+        lxc image refresh debian/12/cloud --quiet
+        PREFIX="" echoinfo DONE
+    fi
+}
+
 ### MAIN
 
-if [[ "${1:-}" == "SESSION_RELOAD_REQUIRED" ]]; then
+if [[ "${2:-}" == "SESSION_RELOAD_REQUIRED" ]]; then
     SESSION_RELOAD_REQUIRED=true
     shift
 else
@@ -392,12 +393,11 @@ else
     add_toolbox_sudoers
     prepare_nftables
     prepare_lxd "$@"
-    override_lxd_service_to_reload_nftables
+    preload_bookworm_image
     miaou_resolver
     miaou_evalfrombashrc
     miaou_configfiles
     ask_for_credential
-    prepare_nftables
     opt_link
     extra_dev_desktop