diff --git a/install.sh b/install.sh
index 433a9ee..14bf0d1 100755
--- a/install.sh
+++ b/install.sh
@@ -19,7 +19,7 @@ function getFilteredModules() {
   if [ "${#module}" -eq 0 ]; then
     echo "${allModules[@]}"
   else
-    local modulesToKeep=()
+    local mod modulesToKeep=()
     for mod in "${allModules[@]}"; do
       local foundAtIndex="${module[(Ie)${mod}]}"
       if [ "${inverse}" != 'true' -a "${foundAtIndex}" -gt 0 ]; then
@@ -32,6 +32,130 @@ function getFilteredModules() {
   fi
 }
 
+function runModule() {
+  local mod="$1"
+  shift
+  ${_DIR:-.}/${mod} "$@"
+}
+
+function parseQuestionLine() {
+  local questionType parameterName question value arguments args
+  local -A typeMap=([i]=info [p]=password [c]=confirm [s]=select)
+  [ -z "${line}" ] && return
+  [ "${line[2]}" != ':' ] && return 10
+
+  questionType="${typeMap[${line[1]}]}"
+  [ -z "${questionType}" ] && return 11
+
+  # remove question type
+  [ "${line[3]}" = ' ' ] && line="${line:3}" || line="${line:2}"
+
+  line=("${(s.=.)line[@]}")
+  parameterName="${line[1]}"
+  [ -z "${parameterName}" ] && return 12
+  [ "${parameterName[1]}" = '-' ] && return 13
+
+  # remove parameter name
+  line="${(j.=.)${(@)line:1}}"
+
+  line=("${(s. #.)line}")
+  question="${line[1]}"
+  [ -z "${question}" ] && return 14
+
+  # remove question part
+  line="${(j. #.)${(@)line:1}}"
+
+  if [ -n "${line}" ]; then
+    arguments=("${(s.;.)line}")
+    for arg in "${arguments[@]}"; do
+      arg=("${(s.:.)arg}")
+      [ -z "${arg[1]}" ] && return 15
+      arg[1]="`trim "${arg[1]}"`"
+      arg[2]="`trim "${arg[2]}"`"
+      questionType+=";${(j.:.)arg}"
+    done
+  fi
+
+
+  printf -v value '%s\n%s' "${question}" "${questionType}"
+  questions+=("${parameterName}" "${value}")
+}
+
+function populateQuestionsWithModuleRequiredInformation() {
+  for line in "${(f)$(runModule "${mod}" --show-required-information)}"; do
+    parseQuestionLine
+  done
+}
+
+function convertQuestionArgsToAskUserArgs() {
+  local arg argName argValue
+  local instructions=("${(s.;.)questionArgs}")
+  local questionType="${instructions[1]}"
+  shift instructions
+
+  if [ "${questionType}" = 'info' ]; then
+    args=(info)
+  elif [ "${questionType}" = 'password' ]; then
+    args=('-p' info)
+  elif [ "${questionType}" = 'confirm' ]; then
+    args=(confirm)
+  elif [ "${questionType}" = 'select' ]; then
+    for arg in "${instructions[@]}"; do
+      arg=("${(s.:.)arg}")
+      [ "${#arg}" -lt 2 ] && continue
+      argName="${arg[1]}"
+      argValue="${arg[2]}"
+      [ "${argName}" != 'choose from' ] && continue
+      choices=("${(s.,.)argValue}")
+    done
+    [ "${#choices}" -ge 1 ] || return 10
+    args=(choose)
+  fi
+}
+
+function askUserQuestion() {
+  local choices
+  local questionAndArgs=("${(f)questions[$questionID]}") args=()
+  local question="${questionAndArgs[1]}" questionArgs="${questionAndArgs[2]}"
+  convertQuestionArgsToAskUserArgs
+  askUser "${args[@]}" "${question}"
+  value="${REPLY}"
+}
+
+function generateConfigKeysFromQuestionID() {
+  setopt localoptions extendedglob
+  [ $# -lt 2 -o -z "$1" -o -z "$2" ] && return
+  local modName="${1}" questID="${2}"
+  modName="${${${${modName//-##/_}/#_/}/%_/}//[^A-Za-z_]/}"
+  questID="${${${${questID//-##/_}/#_/}/%_/}//[^A-Za-z_]/}"
+  configkeys=("${modName}" questions "${questID}")
+}
+
+function answerQuestionsFromConfigOrAskUser() {
+  local questionID
+  config setappname "de.astzweig.macos.system-setup"
+  for questionID in "${(k)questions[@]}"; do
+    local value configkeys=()
+    generateConfigKeysFromQuestionID "${mod}" "${questionID}"
+    value="`config read "${configkeys[@]}"`"
+    if [ -z "${value}" ]; then
+      askUserQuestion
+      config write "${value}" "${configkeys[@]}"
+    fi
+    answers+=("${mod}_${questionID}" "${value}")
+  done
+}
+
+function askNecessaryQuestions() {
+  local mod
+  local -A answers
+  for mod in "${modulesToInstall[@]}"; do
+    local -A questions=()
+    populateQuestionsWithModuleRequiredInformation
+    answerQuestionsFromConfigOrAskUser
+  done
+}
+
 function main() {
   eval "`docopts -f -V - -h - : "$@" <<- USAGE
   Usage: $0 [options] [<module>...]
@@ -50,9 +174,11 @@ function main() {
   local modulesToInstall=(`getFilteredModules`)
   ensureDocopts
   autoloadZShLib
+  askNecessaryQuestions
   hio debug "Current working dir is: `pwd`"
 }
 
 if [[ "${ZSH_EVAL_CONTEXT}" == toplevel ]]; then
+  _DIR="${0:A:h}"
   main
 fi
diff --git a/spec/answerQuestionsFromConfigOrAskUser_spec.sh b/spec/answerQuestionsFromConfigOrAskUser_spec.sh
new file mode 100644
index 0000000..4efdb6c
--- /dev/null
+++ b/spec/answerQuestionsFromConfigOrAskUser_spec.sh
@@ -0,0 +1,63 @@
+Describe 'answerQuestionsFromConfigOrAskUser'
+  Include ./install.sh
+  mod="testmod"
+
+  It 'does nothing if module has no questions' 
+    declare -A questions=()
+    When call answerQuestionsFromConfigOrAskUser 
+    The output should eq ''
+    The variable 'questions' should eq ''
+    The status should be success
+  End
+
+  It 'asks the user if the question is not in the config' 
+    declare -A questions=([question-one]=$'What is your favorite color?\ninfo')
+    Data 'blue'
+    config() {}
+    When call answerQuestionsFromConfigOrAskUser
+    The output should eq "What is your favorite color? "
+    The status should be success
+  End
+
+  It 'does not ask the user if the question is stored in the config' 
+    declare -A questions=([question-one]=$'What is your favorite color?\ninfo')
+    config() { [ "${1}" = read ] && echo red; }
+    When call answerQuestionsFromConfigOrAskUser
+    The output should eq ''
+    The status should be success
+  End
+
+  It 'stores the answer in the answers array if asking user'
+    declare -A answers
+    declare -A questions=([question-one]=$'What is your favorite color?\ninfo')
+    config() {}
+    Data 'blue'
+    When call answerQuestionsFromConfigOrAskUser
+    The output should eq "What is your favorite color? "
+    The variable "answers[${mod}_question-one]" should eq 'blue'
+    The status should be success
+  End
+
+  It 'stores the answer in the answers array if retrieving from config'
+    declare -A answers
+    declare -A questions=([question-one]=$'What is your favorite color?\ninfo')
+    config() { [ "${1}" = read ] && echo red; }
+    When call answerQuestionsFromConfigOrAskUser
+    The output should eq ''
+    The variable "answers[${mod}_question-one]" should eq 'red'
+    The status should be success
+  End
+
+  It 'stores the user answer to config'
+    declare -A answers
+    declare -A questions=([question-one]=$'What is your favorite color?\ninfo')
+    writtenValue=""
+    Data 'red'
+    config() { [ "${1}" = read ] && return; [ "${1}" = write ] && writtenValue="${2}" }
+    When call answerQuestionsFromConfigOrAskUser
+    The output should eq "What is your favorite color? "
+    The variable "answers[${mod}_question-one]" should eq 'red'
+    Assert test "${writtenValue}" = 'red'
+    The status should be success
+  End
+End
diff --git a/spec/convertQuestionArgsToAskUserArgs_spec.sh b/spec/convertQuestionArgsToAskUserArgs_spec.sh
new file mode 100644
index 0000000..ecf03b7
--- /dev/null
+++ b/spec/convertQuestionArgsToAskUserArgs_spec.sh
@@ -0,0 +1,52 @@
+Describe 'convertQuestionArgsToAskUserArgs'
+  Include ./install.sh
+
+  It 'converts info to info'
+    args=()
+    choices=()
+    questionArgs='info'
+    When call convertQuestionArgsToAskUserArgs
+    The output should eq ''
+    The variable args should eq 'info'
+    The variable choices should eq ''
+    The status should be success
+  End
+
+  It 'converts password to -p info'
+    args=() choices=() questionArgs='password'
+    When call convertQuestionArgsToAskUserArgs
+    The variable args should eq '-p info'
+    The variable choices should eq ''
+  End
+
+  It 'converts confirm to confirm'
+    args=() choices=() questionArgs='confirm'
+    When call convertQuestionArgsToAskUserArgs
+    The variable args should eq 'confirm'
+    The variable choices should eq ''
+  End
+
+  It 'returns if type is select but no choose from arg is provided'
+    args=() choices=() questionArgs='select'
+    When call convertQuestionArgsToAskUserArgs
+    The variable args should eq ''
+    The variable choices should eq ''
+    The status should eq 10
+  End
+
+  It 'converts select to choose'
+    args=() choices=() questionArgs='select;choose from:blue,light green,red'
+    When call convertQuestionArgsToAskUserArgs
+    The variable args should eq 'choose'
+    The variable choices should eq 'blue light green red'
+    The variable '#choices' should eq 3
+  End
+
+  It 'finds choose from arg even if many args are provided'
+    args=() choices=() questionArgs='select;first arg:red;choose from:blue,light green,red;after arg:nine;after arg:nine;'
+    When call convertQuestionArgsToAskUserArgs
+    The variable args should eq 'choose'
+    The variable choices should eq 'blue light green red'
+    The variable '#choices' should eq 3
+  End
+End
diff --git a/spec/generateConfigKeysFromQuestionID_spec.sh b/spec/generateConfigKeysFromQuestionID_spec.sh
new file mode 100644
index 0000000..359f570
--- /dev/null
+++ b/spec/generateConfigKeysFromQuestionID_spec.sh
@@ -0,0 +1,59 @@
+Describe 'generateConfigKeysFromQuestionID'
+  Include ./install.sh
+
+  It 'does nothing if given no arguments' 
+    declare -A configkeys=()
+    When call generateConfigKeysFromQuestionID ''
+    The output should eq ''
+    The variable 'configkeys' should eq ''
+    The status should be success
+  End
+
+  It 'does nothing if question id is empty' 
+    declare configkeys=()
+    When call generateConfigKeysFromQuestionID 'somemod' ''
+    The output should eq ''
+    The variable 'configkeys' should eq ''
+    The status should be success
+  End
+
+  It 'generates key when given module name and question id'
+    declare configkeys=()
+    When call generateConfigKeysFromQuestionID 'somemod' 'somekey'
+    The output should eq ''
+    The variable 'configkeys' should eq 'somemod questions somekey'
+    The status should be success
+  End
+
+  It 'replaces minus with underscore'
+    declare configkeys=()
+    When call generateConfigKeysFromQuestionID 'some-mod' 'somekey'
+    The output should eq ''
+    The variable 'configkeys' should eq 'some_mod questions somekey'
+    The status should be success
+  End
+
+  It 'replaces multiple minus with single underscore'
+    declare configkeys=()
+    When call generateConfigKeysFromQuestionID 'some---mod' 'so--mekey'
+    The output should eq ''
+    The variable 'configkeys' should eq 'some_mod questions so_mekey'
+    The status should be success
+  End
+
+  It 'replaces underscores at the begin and end of string'
+    declare configkeys=()
+    When call generateConfigKeysFromQuestionID '--some-mod' '--somekey-'
+    The output should eq ''
+    The variable 'configkeys' should eq 'some_mod questions somekey'
+    The status should be success
+  End
+
+  It 'removes all chars but [A-Za-z_]'
+    declare configkeys=()
+    When call generateConfigKeysFromQuestionID '*some≠{mod' '?`somekey'
+    The output should eq ''
+    The variable 'configkeys' should eq 'somemod questions somekey'
+    The status should be success
+  End
+End
diff --git a/spec/parseQuestionLine_spec.sh b/spec/parseQuestionLine_spec.sh
new file mode 100644
index 0000000..5422d70
--- /dev/null
+++ b/spec/parseQuestionLine_spec.sh
@@ -0,0 +1,88 @@
+Describe 'parseQuestionLine'
+  Include ./install.sh
+
+  It 'does nothing if the line is empty' 
+    line=''
+    When call parseQuestionLine
+    The output should eq ''
+    The status should be success
+  End
+
+  It 'does nothing if the line does not have a question type' 
+    line='some value here'
+    When call parseQuestionLine
+    The output should eq ''
+    The status should eq 10
+  End
+
+  It 'does nothing if the line does not have a valid question type' 
+    line='z: some value here'
+    When call parseQuestionLine
+    The output should eq ''
+    The status should eq 11
+  End
+
+  It 'does nothing if the line does not have a parameter name' 
+    line='i: '
+    When call parseQuestionLine
+    The output should eq ''
+    The status should eq 12
+  End
+
+  It 'does nothing if the parameter name starts with a dash'
+    line='i: -parameter-name=Is this my question?'
+    When call parseQuestionLine
+    The output should eq ''
+    The status should eq 13
+  End
+
+  It 'does nothing if the line does not have a question' 
+    line='i: parameter-name='
+    When call parseQuestionLine
+    The output should eq ''
+    The status should eq 14
+  End
+
+  It 'extends outer questions associative array with question'
+    declare -A questions
+    line='i: parameter-name=What parameter do you like? #'
+    When call parseQuestionLine
+    The output should eq ''
+    The line 1 of variable 'questions[parameter-name]' should eq 'What parameter do you like?'
+    The line 2 of variable 'questions[parameter-name]' should eq info
+    The status should be success
+  End
+
+  It 'does nothing if an argument does not contain a name'
+    declare -A questions
+    line='i: parameter-name=What parameter do you like? # some arg = some value;;'
+    When call parseQuestionLine
+    The output should eq ''
+    The variable 'questions' should eq ''
+    The status should eq 15
+  End
+
+  It 'writes question type to outer questions associative array'
+    declare -A questions
+    line='s: parameter-name=What parameter do you like? # choose from: blue,red,light green; default: blue'
+    When call parseQuestionLine
+    The line 2 of variable 'questions[parameter-name]' should eq 'select;choose from:blue,red,light green;default:blue'
+  End
+End
+
+Describe "parseQuestionLine type renaming"
+  Include ./install.sh
+  Parameters
+    i info
+    p password
+    c confirm
+    s select
+  End
+
+  It "converts $1 to $2"
+    declare -A questions
+    line="${1}: parameter-name=What parameter do you like? #"
+    When call parseQuestionLine
+    The line 2 of variable 'questions[parameter-name]' should eq "$2"
+  End
+End