... aqui dejo el codigo ... por fin lo logre ..
Código PHP:
<head>
<!-- TinyMCE -->
<script type="text/javascript" src="../jscripts/tiny_mce/tiny_mce.js"></script>
<script type="text/javascript">
tinyMCE.init({
mode : "exact",
elements: "editor",
theme : "advanced",
plugins: "fullscreen, advlink, advimage",
theme_advanced_buttons1 : "bold,italic,underline,separator,justifyleft,justifycenter,justifyright,justifyfull,separator,bullist,numlist",
theme_advanced_buttons2 : "outdent,indent,separator,undo,redo,separator,link,fullscreen",
theme_advanced_buttons3 : "",
theme_advanced_toolbar_location: "top",
theme_advanced_toolbar_align: "center"
});
</script>
<!-- /TinyMCE -->
</head>
<body>
<textarea name="meta_titulo" onKeyUp="cuentanoticias()" cols="60" rows="3" class="fValidate['required'] Estilo3" id="meta_titulo" ><?php echo $noticia[meta_titulo] ?></textarea>
<textarea name="contenido" onKeyUp="cuentanoticias()" cols="60" rows="35" class="fValidate['required'] Estilo3" id="editor"><?php echo $noticia[contenido] ?></textarea>
</body>
espero que ha alguien le sea util ..