diff --git a/replace.cmd b/replace.cmd
index 7257caf..5e56717 100644
--- a/replace.cmd
+++ b/replace.cmd
@@ -1,16 +1,22 @@
 @echo off
-set NODEJS=node.exe
+if exist "%SystemRoot%\SysWOW64\cmd.exe" set x64=1
+set NODEJS_x64=node64.exe
+set NODEJS_x86=node32.exe
+set leanify_x64=Leanify64.exe
+set leanify_x86=Leanify32.exe
 set "WORK_DIR=%~dp0"
 set mainjs=node-chrome-pak.js
 set file=chrome_100_percent.pak
 set unpack-dir=unpacked
 set modified-dir=modified
-set leanify=Leanify.exe
 set leanify_enabled=1
 if not exist "%WORK_DIR%" md "%WORK_DIR%"
 pushd "%WORK_DIR%"
 if exist settings.ini for /f "tokens=* eol=; delims=" %%i in (settings.ini) do set %%i
-if not exist %NODEJS% exit
+if "x64"=="1" ( set NODEJS=%NODEJS_x64% ) else (set NODEJS=%NODEJS_x86%)
+if "x64"=="1" ( set leanify=%leanify_x64% ) else (set leanify=%leanify_x86%)
+if not exist %NODEJS% echo nodejs(%NODEJS%) NOT FOUND! &pause &exit
 if not exist "%WORK_DIR%\%modified-dir%" md "%WORK_DIR%\%modified-dir%" &exit
 if %leanify_enabled%==1 if exist %leanify% %leanify% -q "%WORK_DIR%\%modified-dir%"
 if exist "%WORK_DIR%\%file%" for %%i in (%modified-dir%\*) do %NODEJS% %mainjs% replace "%WORK_DIR%\%file%" %%~ni "%%~fsnxi"
+timeout /t 5||pause
\ No newline at end of file
diff --git a/settings.ini b/settings.ini
index cfbfe51..ce28a39 100644
--- a/settings.ini
+++ b/settings.ini
@@ -3,8 +3,11 @@
 ;Settings here will override default ones hardcoded in the cmd
 ;NO SPACES ALLOWED
 ;
-;NODEJS=node.exe
-;the file name of nodejs
+;NODEJS_x64=node64.exe
+;the file name of nodejs for 64-bit system
+;
+;NODEJS_x86=node32.exe
+;the file name of nodejs for 32-bit system
 ;
 ;mainjs=node-chrome-pak.js
 ;the file name of main program
@@ -18,8 +21,11 @@ unpack-dir=unpacked
 modified-dir=modified
 ;the folder to merge the modified files
 ;
-leanify=Leanify.exe
-;a tool to reduce the size of png images https://github.com/JayXon/Leanify
+leanify_x64=Leanify64.exe
+;a tool to reduce the size of png images (https://github.com/JayXon/Leanify) for 64-bit system
+;
+leanify_x86=Leanify32.exe
+;a tool to reduce the size of png images (https://github.com/JayXon/Leanify) for 32-bit system
 ;
 leanify_enabled=1
 ;1 to enable leanify, other to disable
\ No newline at end of file
diff --git a/unpack.cmd b/unpack.cmd
index cc3ff31..930a2ea 100644
--- a/unpack.cmd
+++ b/unpack.cmd
@@ -1,5 +1,7 @@
 @echo off
-set NODEJS=node.exe
+if exist "%SystemRoot%\SysWOW64\cmd.exe" set x64=1
+set NODEJS_x64=node64.exe
+set NODEJS_x86=node32.exe
 set "WORK_DIR=%~dp0"
 set mainjs=node-chrome-pak.js
 set file=chrome_100_percent.pak
@@ -8,6 +10,9 @@ set modified-dir=modified
 if not exist "%WORK_DIR%" md "%WORK_DIR%"
 pushd "%WORK_DIR%"
 if exist settings.ini for /f "tokens=* eol=; delims=" %%i in (settings.ini) do set %%i
+if "x64"=="1" ( set NODEJS=%NODEJS_x64% ) else (set NODEJS=%NODEJS_x86%)
+if not exist %NODEJS% echo nodejs(%NODEJS%) NOT FOUND! &pause &exit
 if not exist "%WORK_DIR%\%unpack-dir%" md "%WORK_DIR%\%unpack-dir%"
 if not exist "%WORK_DIR%\%modified-dir%" md "%WORK_DIR%\%modified-dir%"
-if exist "%WORK_DIR%\%file%" %NODEJS% %mainjs% unpack "%WORK_DIR%\%file%" "%WORK_DIR%\%unpack-dir%"
\ No newline at end of file
+if exist "%WORK_DIR%\%file%" %NODEJS% %mainjs% unpack "%WORK_DIR%\%file%" "%WORK_DIR%\%unpack-dir%"
+timeout /t 5||pause
\ No newline at end of file