diff --git a/examples/config/index.js b/examples/config/index.js
index 281b0a8..2d41054 100644
--- a/examples/config/index.js
+++ b/examples/config/index.js
@@ -1,7 +1,7 @@
 var path = require('path');
 var nodelua = require('../../');
 
-var lua = new nodelua.LuaObject();
+var lua = new nodelua.LuaState('config');
 
 // set a default value
 lua.setGlobal('js_value', 'this is js_value');
@@ -9,9 +9,9 @@ console.log('js_value: ' + lua.getGlobal('js_value'));
 
 console.log('Processing Config.lua');
 var config = path.resolve(__dirname, 'config.lua');
-lua.doFile(config);
-
-console.log('js_value: ' + lua.getGlobal('js_value'));
-console.log('val_one: ' + lua.getGlobal('val_one'));
-console.log('val_two: ' + lua.getGlobal('val_two'));
-console.log('val_three: ' + lua.getGlobal('val_three'));
\ No newline at end of file
+lua.doFile(config, function(){
+	console.log('js_value: ' + lua.getGlobal('js_value'));
+	console.log('val_one: ' + lua.getGlobal('val_one'));
+	console.log('val_two: ' + lua.getGlobal('val_two'));
+	console.log('val_three: ' + lua.getGlobal('val_three'));
+    });
\ No newline at end of file
diff --git a/examples/files/index.js b/examples/files/index.js
new file mode 100644
index 0000000..a72cff1
--- /dev/null
+++ b/examples/files/index.js
@@ -0,0 +1,14 @@
+var nodelua = require('../../');
+
+var luastate = new nodelua.LuaState('files');
+
+luastate.setGlobal('test', 'some value');
+
+var file_name = __dirname + '/test.lua';
+luastate.doFile(file_name, function(err, ret){
+	if(!err && ret){
+	    console.log(ret);
+	} else{
+	    console.error(err);
+	}
+    });
\ No newline at end of file
diff --git a/examples/files/test.lua b/examples/files/test.lua
new file mode 100644
index 0000000..1eefc52
--- /dev/null
+++ b/examples/files/test.lua
@@ -0,0 +1 @@
+return "lua:" .. test
\ No newline at end of file
diff --git a/examples/functions/index.js b/examples/functions/index.js
index dc278f2..fae5e8f 100644
--- a/examples/functions/index.js
+++ b/examples/functions/index.js
@@ -1,22 +1,13 @@
 var nodelua = require('../../');
 
-var lua = new nodelua.LuaObject();
+var lua = new nodelua.LuaState('functions');
 
-var add_them = new nodelua.LuaFunction('add_them', function(a, b){
-	console.log('Adding ' + a + ' and ' + b + ' in js');
+lua.registerFunction('add', function(a, b){
 	return a + b;
     });
-lua.registerFunction(add_them);
 
-// Functionas are registered globally
-// for all LuaObjects
-var lua_two = new nodelua.LuaObject();
-lua_two.doString("print('Result in Lua: ' .. nodelua('add_them', 10, 5))");
+lua.doStringSync("print('Result in Lua: ' .. add(10, 5))");
 
-var subtract_them = new nodelua.LuaFunction('subtract_them', function(a, b){
-	console.log('Subtracting ' + a + ' and ' + b + ' in js');
-	return a - b;
-    });
-
-lua_two.registerFunction(subtract_them);
-lua.doString("print('Result in Lua: ' .. nodelua('subtract_them', 10, 5))");
\ No newline at end of file
+var lua_two = new nodelua.LuaState('two');
+// this will throw an error
+lua_two.doStringSync("add(10, 5)");
\ No newline at end of file
diff --git a/examples/simple/index.js b/examples/simple/index.js
index 99a8e6c..9585cf2 100644
--- a/examples/simple/index.js
+++ b/examples/simple/index.js
@@ -1,11 +1,11 @@
 var nodelua = require('../../');
 
-var lua = new nodelua.LuaObject();
+var lua = new nodelua.LuaState('simple');
 
 lua.setGlobal('js_value', 500);
 
-lua.doString('print(js_value)');
-
-lua.doString('js_value = "something new"');
-
-console.dir(lua.getGlobal('js_value'));
\ No newline at end of file
+lua.doString('print("js_value: " .. js_value)', function(){
+	lua.doString('js_value = "something new"', function(){
+		console.log('js_value: ' + lua.getGlobal('js_value'));
+	    });
+    });
\ No newline at end of file