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('insertdatetime');var TinyMCE_InsertDateTimePlugin={getInfo:function(){return{longname:'Insert date/time',author:'Moxiecode Systems AB',authorurl:'http://tinymce.moxiecode.com',infourl:'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/insertdatetime',version:tinyMCE.majorVersion+"."+tinyMCE.minorVersion}},getControlHTML:function(cn){switch(cn){case"insertdate":return tinyMCE.getButtonHTML(cn,'lang_insertdate_desc','{$pluginurl}/images/insertdate.gif','mceInsertDate');case"inserttime":return tinyMCE.getButtonHTML(cn,'lang_inserttime_desc','{$pluginurl}/images/inserttime.gif','mceInsertTime')}return""},execCommand:function(editor_id,element,command,user_interface,value){function addZeros(value,len){value=""+value;if(value.length<len){for(var i=0;i<(len-value.length);i++)value="0"+value}return value}function getDateTime(d,fmt){fmt=fmt.replace("%D","%m/%d/%y");fmt=fmt.replace("%r","%I:%M:%S %p");fmt=fmt.replace("%Y",""+d.getFullYear());fmt=fmt.replace("%y",""+d.getYear());fmt=fmt.replace("%m",addZeros(d.getMonth()+1,2));fmt=fmt.replace("%d",addZeros(d.getDate(),2));fmt=fmt.replace("%H",""+addZeros(d.getHours(),2));fmt=fmt.replace("%M",""+addZeros(d.getMinutes(),2));fmt=fmt.replace("%S",""+addZeros(d.getSeconds(),2));fmt=fmt.replace("%I",""+((d.getHours()+11)%12+1));fmt=fmt.replace("%p",""+(d.getHours()<12?"AM":"PM"));fmt=fmt.replace("%B",""+tinyMCE.getLang("lang_inserttime_months_long")[d.getMonth()]);fmt=fmt.replace("%b",""+tinyMCE.getLang("lang_inserttime_months_short")[d.getMonth()]);fmt=fmt.replace("%A",""+tinyMCE.getLang("lang_inserttime_day_long")[d.getDay()]);fmt=fmt.replace("%a",""+tinyMCE.getLang("lang_inserttime_day_short")[d.getDay()]);fmt=fmt.replace("%%","%");return fmt}switch(command){case"mceInsertDate":tinyMCE.execInstanceCommand(editor_id,'mceInsertContent',false,getDateTime(new Date(),tinyMCE.getParam("plugin_insertdate_dateFormat",tinyMCE.getLang('lang_insertdate_def_fmt'))));return true;case"mceInsertTime":tinyMCE.execInstanceCommand(editor_id,'mceInsertContent',false,getDateTime(new Date(),tinyMCE.getParam("plugin_insertdate_timeFormat",tinyMCE.getLang('lang_inserttime_def_fmt'))));return true}return false}};tinyMCE.addPlugin("insertdatetime",TinyMCE_InsertDateTimePlugin);