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.AdvancedLinkPlugin',{init:function(ed,url){this.editor=ed;ed.addCommand('mceAdvLink',function(){var se=ed.selection;if(se.isCollapsed()&&!ed.dom.getParent(se.getNode(),'A'))return;ed.windowManager.open({file:url+'/link.htm',width:480+parseInt(ed.getLang('advlink.delta_width',0)),height:400+parseInt(ed.getLang('advlink.delta_height',0)),inline:1},{plugin_url:url});});ed.addButton('link',{title:'advlink.link_desc',cmd:'mceAdvLink'});ed.addShortcut('ctrl+k','advlink.advlink_desc','mceAdvLink');ed.onNodeChange.add(function(ed,cm,n,co){cm.setDisabled('link',co&&n.nodeName!='A');cm.setActive('link',n.nodeName=='A'&&!n.name);});},getInfo:function(){return{longname:'Advanced link',author:'Moxiecode Systems AB',authorurl:'http://tinymce.moxiecode.com',infourl:'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/advlink',version:tinymce.majorVersion+"."+tinymce.minorVersion};}});tinymce.PluginManager.add('advlink',tinymce.plugins.AdvancedLinkPlugin);})();