Hopefully managed to put enough hacks in there to make renaming the config file the last step, so if it fails, it can be done manually
tinyMCE.importPluginLanguagePack('directionality');var TinyMCE_DirectionalityPlugin={getInfo:function(){return{longname:'Directionality',author:'Moxiecode Systems AB',authorurl:'http://tinymce.moxiecode.com',infourl:'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/directionality',version:tinyMCE.majorVersion+"."+tinyMCE.minorVersion}},getControlHTML:function(cn){switch(cn){case"ltr":return tinyMCE.getButtonHTML(cn,'lang_directionality_ltr_desc','{$pluginurl}/images/ltr.gif','mceDirectionLTR');case"rtl":return tinyMCE.getButtonHTML(cn,'lang_directionality_rtl_desc','{$pluginurl}/images/rtl.gif','mceDirectionRTL')}return""},execCommand:function(editor_id,element,command,user_interface,value){switch(command){case"mceDirectionLTR":var inst=tinyMCE.getInstanceById(editor_id);var elm=tinyMCE.getParentElement(inst.getFocusElement(),"p,div,td,h1,h2,h3,h4,h5,h6,pre,address");if(elm)elm.setAttribute("dir","ltr");tinyMCE.triggerNodeChange(false);return true;case"mceDirectionRTL":var inst=tinyMCE.getInstanceById(editor_id);var elm=tinyMCE.getParentElement(inst.getFocusElement(),"p,div,td,h1,h2,h3,h4,h5,h6,pre,address");if(elm)elm.setAttribute("dir","rtl");tinyMCE.triggerNodeChange(false);return true}return false},handleNodeChange:function(editor_id,node,undo_index,undo_levels,visual_aid,any_selection){function getAttrib(elm,name){return elm.getAttribute(name)?elm.getAttribute(name):""}if(node==null)return;var elm=tinyMCE.getParentElement(node,"p,div,td,h1,h2,h3,h4,h5,h6,pre,address");if(!elm){tinyMCE.switchClass(editor_id+'_ltr','mceButtonDisabled');tinyMCE.switchClass(editor_id+'_rtl','mceButtonDisabled');return true}tinyMCE.switchClass(editor_id+'_ltr','mceButtonNormal');tinyMCE.switchClass(editor_id+'_rtl','mceButtonNormal');var dir=getAttrib(elm,"dir");if(dir=="ltr"||dir=="")tinyMCE.switchClass(editor_id+'_ltr','mceButtonSelected');else tinyMCE.switchClass(editor_id+'_rtl','mceButtonSelected');return true}};tinyMCE.addPlugin("directionality",TinyMCE_DirectionalityPlugin);