Okay, so when you try to include the tinyMCE code using wordpress’ built in wp_enqueue_script() function, it does absolutely nothing. If you try to manually include the script, you’ll end up with all sorts of javascript errors, and missing language translations. However, if you simply call wp_tiny_mce(); in the template_redirect or wp_head function, all the javascript for tiny_mce is loaded properly. Then all you need to do, is run your tinymce.init script to setup your text editor. For example: