Got the installer working. Fixed a few bugs including a nasty-to-debug issue where the lang_id was being hardcoded during installation, resulting in strings being inserted with the wrong lang_id causing an infinfinite loop with fetch() throwing a "no strings" error and using template (which calls fetch()) to complain
(function(){tinymce.create('tinymce.plugins.StylePlugin',{init:function(ed,url){ed.addCommand('mceStyleProps',function(){ed.windowManager.open({file:url+'/props.htm',width:480+parseInt(ed.getLang('style.delta_width',0)),height:320+parseInt(ed.getLang('style.delta_height',0)),inline:1},{plugin_url:url,style_text:ed.selection.getNode().style.cssText});});ed.addCommand('mceSetElementStyle',function(ui,v){if(e=ed.selection.getNode()){ed.dom.setAttrib(e,'style',v);ed.execCommand('mceRepaint');}});ed.onNodeChange.add(function(ed,cm,n){cm.setDisabled('styleprops',n.nodeName==='BODY');});ed.addButton('styleprops',{title:'style.desc',cmd:'mceStyleProps'});},getInfo:function(){return{longname:'Style',author:'Moxiecode Systems AB',authorurl:'http://tinymce.moxiecode.com',infourl:'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/style',version:tinymce.majorVersion+"."+tinymce.minorVersion};}});tinymce.PluginManager.add('style',tinymce.plugins.StylePlugin);})();