diff --git a/build-archiso.sh b/build-archiso.sh
index 78b0cf9..72a8366 100755
--- a/build-archiso.sh
+++ b/build-archiso.sh
@@ -3,13 +3,16 @@
 # https://wiki.archlinux.org/index.php/Archiso#Prepare_a_custom_profile
 #
 # Arch installer with some additional packages:
-# -> de-p1st-installer
+# -> TODO: set custom welchme messae in /etc/motd
+# -> de-p1st-installer (TODO)
 # -> de-p1st mirror in pacman.conf
+# -> german mirrors preselected
 # -> german keyboard
+# -> nano with syntax highlighting
 # -> git
 #
 BUILD_DIR=./archlive
-PKGS=('git' 'de-p1st-keyboard' 'de-p1st-pacman' 'de-p1st-pacman-mirrorlist' 'de-p1st-systemd' 'de-p1st-installer')
+PKGS=('git' 'de-p1st-keyboard' 'de-p1st-nano' 'de-p1st-pacman' 'de-p1st-pacman-mirrorlist' 'de-p1st-systemd')
 PACMAN_CFG_ADDITION='pkg/de-p1st-pacman/pacman.d/de-p1st' # will be used to extend the builder's pacman.conf
 
 
@@ -34,6 +37,7 @@ fi
 
 cp -r "$PROFILE" "$BUILD_DIR"/profile || exit
 
+# extend the builder's pacman.conf (add de-p1st mirrors)
 # https://wiki.archlinux.org/index.php/Archiso#Custom_local_repository
 cat "${PACMAN_CFG_ADDITION}" >> "$BUILD_DIR"/profile/pacman.conf || exit
 
diff --git a/pkg/de-p1st-installer/PKGBUILD_TODO.txt b/pkg/de-p1st-installer/PKGBUILD_TODO.txt
index 4926147..24ab62b 100644
--- a/pkg/de-p1st-installer/PKGBUILD_TODO.txt
+++ b/pkg/de-p1st-installer/PKGBUILD_TODO.txt
@@ -9,7 +9,7 @@ arch=('any')
 url="https://codeberg.org/privacy1st/${_reponame}"
 license=('MIT')
 groups=()
-depends=()
+depends=('dialog')
 makedepends=('git')
 optdepends=()
 provides=()
diff --git a/pkg/de-p1st-installer/de-p1st-installer.sh b/pkg/de-p1st-installer/de-p1st-installer.sh
old mode 100644
new mode 100755
index 05a7907..e493455
--- a/pkg/de-p1st-installer/de-p1st-installer.sh
+++ b/pkg/de-p1st-installer/de-p1st-installer.sh
@@ -1,2 +1,187 @@
 #!/bin/bash
 
+# load config
+source installer.cfg || { exit 1; }
+
+
+function check_network() {
+  echo "Sending ping to wikipedia.de ..."
+  ping -c 1 wikipedia.de || {
+    echo "Pleas set up network access."
+    return 1
+  }
+}
+
+function increase_cow_space() {
+  # May be useful when running 'pacman -Syu' on the live medium.
+  # Usually not necessary!
+
+  # make sure that we are on a live medium:
+  findmnt /run/archiso/cowspace || {
+    echo "Not on live medium, did not increase cowspace!"
+    return 1
+  }
+
+  echo "Increasing cowspace partition of live medium ..."
+  mount -o remount,size=2G /run/archiso/cowspace || return $?
+}
+
+function get_block_devices(){
+  # return: the following variables:
+  #   BLOCK_DEVICES (array with each block device as one entry)
+
+  local tmp
+#  # get list of devices , one per line
+#  #
+#  # -> remove everything after first whitespace
+#  #    -> with sed; alternative: awk '{print $1}'
+#  # -> add "/dev/" at start of each line
+#  tmp=$(lsblk --noheadings --nodeps | sed 's|\s.*$||; s|^|&/dev/|') || return $?
+  tmp=$(lsblk -dplnx size -o name | grep -Ev "boot|rpmb|loop")
+
+  readarray -t BLOCK_DEVICES <<<"$tmp"
+}
+
+function get_block_devices_with_size() {
+  # return: the following variables:
+  #   BLOCK_DEVICE_SIZES (space separated list of block devices and their sizes)
+
+  # one could use sed to remove multiple white spaces
+  # sed 's|\s\s*| |'
+  BLOCK_DEVICE_SIZES="$(lsblk -dplnx size -o name,size | grep -Ev "boot|rpmb|loop" | tac)"
+}
+
+function get_text_input {
+  # If variable with name $1 is zero, then ask user for input.
+  # Only one line user input is allowed.
+  # User input must not be empty.
+  #
+  # $1: name of variable to store user input
+  # $2: text to display (e.g. "Enter hostname:")
+  if [ "$#" -ne 2 ]; then
+    echo "get_text_input requires two args!";
+    return 1
+  fi
+  for i in "$@"; do
+    if [ -z "$i" ]; then
+      echo "get_menu_selections: all given args must not be empty";
+      return 1;
+    fi
+  done
+
+  local -n VAR=$1
+  if [ -z "$VAR" ]; then
+    # if VAR has no value yet, ask user for input!
+    echo "$2"
+    read -r VAR || return $?
+  fi
+
+  # check string length to be greater than zero!
+  if [ "${#VAR}" -lt 1 ]; then
+    echo "get_text_input must not be empty!";
+    return 1;
+  fi
+}
+
+function get_menu_selection {
+  # If variable with name $1 is zero, then ask user to select one option.
+  #
+  # $1: name of variable to store user selection
+  # $2: text to display
+  # $3: name of variable with space-separated menu options to display (each menu option consists of an item and a description)
+  if [ "$#" -ne 3 ]; then
+    echo "get_menu_selection requires three args!";
+    return 1
+  fi
+  for i in "$@"; do
+    if [ -z "$i" ]; then
+      echo "get_menu_selections: all given args must not be empty";
+      return 1;
+    fi
+  done
+
+
+  local -n VAR=$1
+  if [ -z "$VAR" ]; then
+    # if VAR has no value yet, ask user for input!
+
+    local -n MENU_OPTIONS=$3
+    VAR=$(dialog --stdout --menu "$2" 0 0 0 ${MENU_OPTIONS}) || {
+      echo "Error during menu selection!"
+      exit 1
+    }
+    clear
+  fi
+}
+
+function get_user_input() {
+  # return: the following variables:
+  #   BIOS_TYPE (uefi or bios)
+  #   KERNEL    (linux or linux-lts)
+  #   FS        (BTRFS, EXT4, F2FS)
+  #   HOSTNAME
+  #   USERNAME, USER_PWD
+  #   LUKS_PWD
+
+  #  get_block_devices || return $?
+  get_block_devices_with_size || return $?
+  get_menu_selection  TARGET_BLOCK_DEVICE "Select target device for installation" BLOCK_DEVICE_SIZES || return $?
+
+  TMP1="uefi Newer-mainboards bios Legacy-BIOS-on-older-mainboards"
+  get_menu_selection  BIOS_TYPE "Select your bios type" TMP1 || return $?
+
+  TMP1="linux-lts Long-Time-Stable-Linux-kernel linux Latest-Linux-kernel"
+  get_menu_selection  KERNEL "Select kernel version" TMP1 || return $?
+
+  TMP1="BTRFS allows-snapshots-and-dynamic-extension-of-the-fs EXT4 default-fs-of-many-distributions F2FS Flash-Friendly-fs-for-SSD-or-NVMe"
+  get_menu_selection  FS "Select filesystem to use" TMP1 || return $?
+
+  get_text_input HOSTNAME "Enter hostname:" || return $?
+  get_text_input USERNAME "Enter username:" || return $?
+
+  if [ -z "${USER_PWD}" ]; then
+    get_text_input USER_PWD "Enter a user password:" || return $?
+    get_text_input USER_PWD2 "Please enter the password again:" || return $?
+    [[ "${USER_PWD}" == "${USER_PWD2}" ]] || {
+      echo "Passwords did not match";
+      exit 1;
+    }
+  fi
+  if [ -z "${LUKS_PWD}" ]; then
+    get_text_input LUKS_PWD "Enter a disk encryption password:" || return $?
+    get_text_input LUKS_PWD2 "Please enter the password again:" || return $?
+    [[ "${LUKS_PWD}" == "${LUKS_PWD2}" ]] || {
+      echo "Passwords did not match";
+      exit 1;
+    }
+  fi
+}
+
+function get_cpu_vendor() {
+    # return: the following variables:
+    #   CPU_VENDOR ("amd", "intel", "none")
+
+  if [ -z "${CPU_VENDOR}" ]; then
+    # if CPU_VENDOR has no value yet, ask user for input!
+
+    local vendor_id
+    vendor_id=$(cat /proc/cpuinfo | grep vendor_id | head -1 | sed 's|vendor_id\s*:\s*||')
+
+    if [ "$vendor_id" = "AuthenticAMD" ]; then
+      CPU_VENDOR="amd"
+    elif [ "$vendor_id" = "GenuineIntel" ]; then
+      CPU_VENDOR="intel"
+    else
+      echo "Unknown CPU vendor: $vendor_id"
+      return 1
+    fi
+  fi
+}
+
+function main() {
+  check_network  || return $?
+  get_user_input || return $?
+  get_cpu_vendor || return $?
+}
+
+main "$@"
diff --git a/pkg/de-p1st-installer/installer.cfg b/pkg/de-p1st-installer/installer.cfg
new file mode 100644
index 0000000..1e2cefe
--- /dev/null
+++ b/pkg/de-p1st-installer/installer.cfg
@@ -0,0 +1,15 @@
+# Example config
+# for test in virtual machine
+
+HOSTNAME=yodaTest
+USERNAME=arch
+USER_PWD=test
+LUKS_PWD=test
+
+KERNEL=linux
+
+TARGET_BLOCK_DEVICE=/dev/sda
+FS=BTRFS
+
+CPU_VENDOR=none
+BIOS_TYPE=uefi
diff --git a/pkg/de-p1st-installer/name-reference-test.sh b/pkg/de-p1st-installer/name-reference-test.sh
new file mode 100644
index 0000000..0da1c49
--- /dev/null
+++ b/pkg/de-p1st-installer/name-reference-test.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+# source: https://stackoverflow.com/a/52678279/6334421
+
+# A variable can be assigned the nameref attribute using the -n option
+# to the declare or local builtin commands (see Bash Builtins) to create
+# a nameref, or a reference to another variable. This allows variables to
+# be manipulated indirectly.
+
+function text_input {
+  # If variable of name $1 is zero, then ask user for input.
+  # Only one line user input is allowed.
+  # User input must not be empty.
+  #
+  # $1: variable name to store input to
+  # $2: text to display (e.g. "Enter hostname:")
+  if [ -z "$1" ] || [ -z "$2" ]; then
+    echo "text_input requires two args!";
+    return 1
+  fi
+
+  local -n VAR=$1
+  if [ -z "$VAR" ]; then
+    echo "$2"
+    read -r VAR || return $?
+  fi
+
+  # check string length to be greater than zero!
+  if [ "${#VAR}" -lt 1 ]; then
+    echo "text_input must not be empty!";
+    return 1;
+  fi
+}
+
+text_input foo "Enter something funny:"
+echo "Input: $foo"
+
+bar=""
+text_input bar "Enter something even funnier:"
+echo "Input: $bar"