change language in TinyMCE

I want to change language 'en' to 'ur'. i had downloaded language folder from http://www.tinymce.com/i18n/index.php?ctrl=lang&act=download&pr_id=1, and replaced its three folders **themes, plugins, langs** by tinymce\jscripts\tiny_mce folders. and then i had changed full.html code in example folder as mentioned: آپ سادہ مرکزی خیال