diff --git a/README.md b/README.md
index 444461c..77605ea 100644
--- a/README.md
+++ b/README.md
@@ -7,12 +7,14 @@ The interface is used with `process.stdin` and `process.stdout` in order to acce
 
 ```js
 var readlineSync = require('readline-sync');
+
 var userName = readlineSync.question('May I have your name? :'); // Wait for user's response.
 var favFood = readlineSync.question('Hi ' + userName + '! What is your favorite food? :');
+
 console.log('Oh, ' + userName + ' likes ' + favFood + '!');
 ```
 
-```shell
+```
 May I have your name? :AnSeki
 Hi AnSeki! What is your favorite food? :chocolate
 Oh, AnSeki likes chocolate!
@@ -29,7 +31,7 @@ npm install readline-sync
 ### question
 
 ```js
-line = readlineSync.question([query[, options]])
+answer = readlineSync.question([query[, options]])
 ```
 
 Displays the `query` to the user, and then returns the user's response after it has been typed.  
@@ -40,7 +42,7 @@ The `query` may be string, or may not be (e.g. number, Date, Object, etc.). This
 ### prompt
 
 ```js
-line = readlineSync.prompt([options])
+input = readlineSync.prompt([options])
 ```
 
 Displays the current prompt (See `setPrompt` method) to the user, and then returns the user's response after it has been typed.  
@@ -49,16 +51,16 @@ You can specify `options`. (see [Options](#options))
 ### setPrompt
 
 ```js
-currentPrompt = readlineSync.setPrompt([prompt])
+currentPrompt = readlineSync.setPrompt([newPrompt])
 ```
 
 Sets the prompt, for example when you run `node` on the command line, you see `> `, which is node's prompt. (See `prompt` method)
 
-The `prompt` may be string, or may not be (e.g. number, Date, Object, etc.). This is converted to string (i.e. `toString` method is called) before it is displayed every time.  
+The `newPrompt` may be string, or may not be (e.g. number, Date, Object, etc.). This is converted to string (i.e. `toString` method is called) before it is displayed every time.  
 For example, `[foo-directory]#` like a bash shell that show the current directory.
 
 ```js
-// Object that has toString method.
+// Simple Object that has toString method.
 readlineSync.setPrompt({
   toString: function() {
     return '[' + require('path').basename(process.cwd()) + ']# '; // Get and show current directory.
@@ -69,7 +71,7 @@ readlineSync.setPrompt({
 ### setEncoding
 
 ```js
-currentEncoding = readlineSync.setEncoding([encoding])
+currentEncoding = readlineSync.setEncoding([newEncoding])
 ```
 
 Set the encoding method of input (user's response) and output (`prompt` method and `question` method). Defaults to 'utf8'.
@@ -77,11 +79,11 @@ Set the encoding method of input (user's response) and output (`prompt` method a
 ### setPrint
 
 ```js
-readlineSync.setPrint([funcPrint])
+readlineSync.setPrint([callback])
 ```
 
-The specified `funcPrint` Function is called when any outputs (`prompt` method and `question` method). Defaults to `undefined`.  
-The `funcPrint` is given two arguments the output text and `encoding`.
+The specified `callback` Function is called when any outputs (`prompt` method and `question` method). Defaults to `undefined`.  
+The `callback` is given two arguments the output text and `encoding`.
 
 ![sample](cl_01.png)
 
@@ -89,7 +91,7 @@ For example, this is used to pass plain texts to the Logger, when texts are colo
 
 ```js
 var readlineSync = require('readline-sync'),
-  user, pw, cmd;
+  user, pw, command;
 require('colors');
 
 readlineSync.setPrint(function(display, encoding) {
@@ -103,7 +105,7 @@ pw = readlineSync.question('PASSWORD'.white.inverse + ': ', {noEchoBack: true});
 console.log(('Welcome, ' + user + '!').green.bold);
 
 readlineSync.setPrompt('> '.bold.red);
-cmd = readlineSync.prompt();
+command = readlineSync.prompt();
 ```
 
 ## Options
diff --git a/lib/read.bat b/lib/read.bat
index c0135b6..9ad1e98 100644
--- a/lib/read.bat
+++ b/lib/read.bat
@@ -1,11 +1,30 @@
 @echo off
 setlocal
 if "%1"=="noechoback" (
-  set /p LINE=<CON >NUL
-  echo; >CON
+  call :exprog
 ) else (
   set /p LINE=<CON >CON
 )
 set /p ="'%LINE%'"<NUL
 endlocal
 exit /b 0
+
+:exprog
+
+:: where /q powershell
+:: Win <Vista and <Server2008 don't have `WHERE`.
+powershell /? >NUL 2>&1
+
+:: Win <7 and <Server2008R2 don't have PowerShell as default.
+:: Win XP and Server2003 have `ScriptPW` (`scriptpw.dll`).
+:: In the systems that don't have both, an error is thrown.
+if errorlevel 1 (
+  set "EXCOMMAND=cscript //nologo "%~dp0read.cs.js""
+) else (
+  set "EXCOMMAND=powershell -Command "$text = read-host -AsSecureString; ^
+    $BSTR = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR^($text^); ^
+    [System.Runtime.InteropServices.Marshal]::PtrToStringAuto^($BSTR^)""
+)
+:: echo %EXCOMMAND%
+for /f "usebackq delims=" %%i in (`%EXCOMMAND%`) do set "LINE=%%i"
+exit /b
diff --git a/lib/read.cs.js b/lib/read.cs.js
new file mode 100644
index 0000000..a59f485
--- /dev/null
+++ b/lib/read.cs.js
@@ -0,0 +1,4 @@
+var oExec;
+WScript.StdOut.Write(WScript.CreateObject('ScriptPW.Password').GetPassword());
+oExec = WScript.CreateObject('WScript.Shell').Exec('cmd /c echo; >CON');
+while (oExec.Status === 0) { WScript.Sleep(100); }
diff --git a/lib/readline-sync.js b/lib/readline-sync.js
index 26ba5dc..566d9a7 100644
--- a/lib/readline-sync.js
+++ b/lib/readline-sync.js
@@ -13,12 +13,14 @@ var
   ALGORITHM_CIPHER = 'aes-256-cbc',
   ALGORITHM_HASH = 'sha256',
 
-  promptText = '> ',
-  encoding = 'utf8',
   fs = require('fs'),
+  childProc = require('child_process'),
   stdin = process.stdin,
   stdout = process.stdout,
   buffer = new Buffer(BUF_SIZE),
+
+  promptText = '> ',
+  encoding = 'utf8',
   useShell = true, print, tempdir, salt = 0;
 
 function _readlineSync(display, options) {
@@ -101,6 +103,7 @@ function _readlineShell(noEchoBack) {
         ' %Q%' + ALGORITHM_CIPHER + '%Q% %Q%' + password + '%Q%' +
       ' >%Q%' + pathStdout + '%Q%' +
       ' & (echo !ERRORLEVEL!)>%Q%' + pathStatus + '%Q% & (echo 1)>%Q%' + pathDone + '%Q%'];
+    process.env.Q = '"';
   } else {
     shellPath = '/bin/sh';
     args = ['-c',
@@ -113,7 +116,10 @@ function _readlineShell(noEchoBack) {
   }
 
   stdin.pause(); // re-start in child process
-  require('child_process').execFile(shellPath, args, {env: {Q: '"'}});
+  childProc.spawn(shellPath, args, {
+    env: process.env,
+    stdio: [stdin] // ScriptPW needs piped stdin
+  });
 
   while (fs.readFileSync(pathDone, {encoding: encoding}).trim() !== '1') {}
   if (fs.readFileSync(pathStatus, {encoding: encoding}).trim() === '0') {
diff --git a/package.json b/package.json
index 09ad721..b48f095 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "readline-sync",
-  "version": "0.5.3",
+  "version": "0.5.4",
   "title": "readlineSync",
   "description": "Synchronous Readline",
   "keywords": [