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(){var DOM=tinymce.DOM,Event=tinymce.dom.Event,each=tinymce.each,is=tinymce.is;tinymce.create('tinymce.plugins.Compat2x',{getInfo:function(){return{longname:'Compat2x',author:'Moxiecode Systems AB',authorurl:'http://tinymce.moxiecode.com',infourl:'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/compat2x',version:tinyMCE.majorVersion+"."+tinyMCE.minorVersion};}});(function(){tinymce.extend(tinyMCE,{addToLang:function(p,l){each(l,function(v,k){tinyMCE.i18n[(tinyMCE.settings.language||'en')+'.'+(p?p+'_':'')+k]=v;});},getInstanceById:function(n){return this.get(n);}});})();(function(){var EditorManager=tinymce.EditorManager;tinyMCE.instances={};tinyMCE.plugins={};tinymce.PluginManager.onAdd.add(function(pm,n,p){tinyMCE.plugins[n]=p;});tinyMCE.majorVersion=tinymce.majorVersion;tinyMCE.minorVersion=tinymce.minorVersion;tinyMCE.releaseDate=tinymce.releaseDate;tinyMCE.baseURL=tinymce.baseURL;tinyMCE.isIE=tinyMCE.isMSIE=tinymce.isIE||tinymce.isOpera;tinyMCE.isMSIE5=tinymce.isIE;tinyMCE.isMSIE5_0=tinymce.isIE;tinyMCE.isMSIE7=tinymce.isIE;tinyMCE.isGecko=tinymce.isGecko;tinyMCE.isSafari=tinymce.isWebKit;tinyMCE.isOpera=tinymce.isOpera;tinyMCE.isMac=false;tinyMCE.isNS7=false;tinyMCE.isNS71=false;tinyMCE.compat=true;TinyMCE_Engine=tinyMCE;tinymce.extend(tinyMCE,{getParam:function(n,dv){return this.activeEditor.getParam(n,dv);},addEvent:function(e,na,f,sc){tinymce.dom.Event.add(e,na,f,sc||this);},getControlHTML:function(n){return EditorManager.activeEditor.controlManager.createControl(n);},loadCSS:function(u){tinymce.DOM.loadCSS(u);},importCSS:function(doc,u){if(doc==document)this.loadCSS(u);else new tinymce.dom.DOMUtils(doc).loadCSS(u);},log:function(){console.debug.apply(console,arguments);},getLang:function(n,dv){var v=EditorManager.activeEditor.getLang(n.replace(/^lang_/g,''),dv);if(/^[0-9\-.]+$/g.test(v))return parseInt(v);return v;},isInstance:function(o){return o!=null&&typeof(o)=="object"&&o.execCommand;},triggerNodeChange:function(){EditorManager.activeEditor.nodeChanged();},regexpReplace:function(in_str,reg_exp,replace_str,opts){var re;if(in_str==null)return in_str;if(typeof(opts)=="undefined")opts='g';re=new RegExp(reg_exp,opts);return in_str.replace(re,replace_str);},trim:function(s){return tinymce.trim(s);},xmlEncode:function(s){return tinymce.DOM.encode(s);},explode:function(s,d){var o=[];tinymce.each(s.split(d),function(v){if(v!='')o.push(v);});return o;},switchClass:function(id,cls){var b;if(/^mceButton/.test(cls)){b=EditorManager.activeEditor.controlManager.get(id);if(!b)return;switch(cls){case"mceButtonNormal":b.setDisabled(false);b.setActive(false);return;case"mceButtonDisabled":b.setDisabled(true);return;case"mceButtonSelected":b.setActive(true);b.setDisabled(false);return;}}},addCSSClass:function(e,n,b){return tinymce.DOM.addClass(e,n,b);},hasCSSClass:function(e,n){return tinymce.DOM.hasClass(e,n);},removeCSSClass:function(e,n){return tinymce.DOM.removeClass(e,n);},getCSSClasses:function(){var cl=EditorManager.activeEditor.dom.getClasses(),o=[];each(cl,function(c){o.push(c['class']);});return o;},setWindowArg:function(n,v){EditorManager.activeEditor.windowManager.params[n]=v;},getWindowArg:function(n,dv){var wm=EditorManager.activeEditor.windowManager,v;v=wm.getParam(n);if(v==='')return'';return v||wm.getFeature(n)||dv;},getParentNode:function(n,f){return this._getDOM().getParent(n,f);},selectElements:function(n,na,f){var i,a=[],nl,x;for(x=0,na=na.split(',');x<na.length;x++)for(i=0,nl=n.getElementsByTagName(na[x]);i<nl.length;i++)(!f||f(nl[i]))&&a.push(nl[i]);return a;},getNodeTree:function(n,na,t,nn){return this.selectNodes(n,function(n){return(!t||n.nodeType==t)&&(!nn||n.nodeName==nn);},na?na:[]);},getAttrib:function(e,n,dv){return this._getDOM().getAttrib(e,n,dv);},setAttrib:function(e,n,v){return this._getDOM().setAttrib(e,n,v);},getElementsByAttributeValue:function(n,e,a,v){var i,nl=n.getElementsByTagName(e),o=[];for(i=0;i<nl.length;i++){if(tinyMCE.getAttrib(nl[i],a).indexOf(v)!=-1)o[o.length]=nl[i];}return o;},selectNodes:function(n,f,a){var i;if(!a)a=[];if(f(n))a[a.length]=n;if(n.hasChildNodes()){for(i=0;i<n.childNodes.length;i++)tinyMCE.selectNodes(n.childNodes[i],f,a);}return a;},getContent:function(){return EditorManager.activeEditor.getContent();},getParentElement:function(n,na,f){if(na)na=new RegExp('^('+na.toUpperCase().replace(/,/g,'|')+')$','g');return this._getDOM().getParent(n,function(n){return n.nodeType==1&&(!na||na.test(n.nodeName))&&(!f||f(n));},this.activeEditor.getBody());},importPluginLanguagePack:function(n){tinymce.PluginManager.requireLangPack(n);},getButtonHTML:function(cn,lang,img,c,u,v){var ed=EditorManager.activeEditor;img=img.replace(/\{\$pluginurl\}/g,tinyMCE.pluginURL);img=img.replace(/\{\$themeurl\}/g,tinyMCE.themeURL);lang=lang.replace(/^lang_/g,'');return ed.controlManager.createButton(cn,{title:lang,command:c,ui:u,value:v,scope:this,'class':'compat',image:img});},addSelectAccessibility:function(e,s,w){if(!s._isAccessible){s.onkeydown=tinyMCE.accessibleEventHandler;s.onblur=tinyMCE.accessibleEventHandler;s._isAccessible=true;s._win=w;}return false;},accessibleEventHandler:function(e){var elm,win=this._win;e=tinymce.isIE?win.event:e;elm=tinymce.isIE?e.srcElement:e.target;if(e.type=="blur"){if(elm.oldonchange){elm.onchange=elm.oldonchange;elm.oldonchange=null;}return true;}if(elm.nodeName=="SELECT"&&!elm.oldonchange){elm.oldonchange=elm.onchange;elm.onchange=null;}if(e.keyCode==13||e.keyCode==32){elm.onchange=elm.oldonchange;elm.onchange();elm.oldonchange=null;tinyMCE.cancelEvent(e);return false;}return true;},cancelEvent:function(e){return tinymce.dom.Event.cancel(e);},handleVisualAid:function(e){EditorManager.activeEditor.addVisual(e);},getAbsPosition:function(n,r){return tinymce.DOM.getPos(n,r);},cleanupEventStr:function(s){s=""+s;s=s.replace('function anonymous()\n{\n','');s=s.replace('\n}','');s=s.replace(/^return true;/gi,'');return s;},getVisualAidClass:function(s){return s;},parseStyle:function(s){return this._getDOM().parseStyle(s);},serializeStyle:function(s){return this._getDOM().serializeStyle(s);},openWindow:function(tpl,args){var ed=EditorManager.activeEditor,o={},n;for(n in tpl)o[n]=tpl[n];tpl=o;args=args||{};tpl.url=new tinymce.util.URI(tinymce.ThemeManager.themeURLs[ed.settings.theme]).toAbsolute(tpl.file);tpl.inline=tpl.inline||args.inline;ed.windowManager.open(tpl,args);},closeWindow:function(win){EditorManager.activeEditor.windowManager.close(win);},getOuterHTML:function(e){return tinymce.DOM.getOuterHTML(e);},setOuterHTML:function(e,h,d){return tinymce.DOM.setOuterHTML(e,h,d);},hasPlugin:function(n){return tinymce.PluginManager.get(n)!=null;},_setEventsEnabled:function(){},addPlugin:function(pn,f){var t=this;function PluginWrapper(ed){tinyMCE.selectedInstance=ed;ed.onInit.add(function(){t.settings=ed.settings;t.settings['base_href']=tinyMCE.documentBasePath;tinyMCE.settings=t.settings;tinyMCE.documentBasePath=ed.documentBasePath;if(f.initInstance)f.initInstance(ed);ed.contentDocument=ed.getDoc();ed.contentWindow=ed.getWin();ed.undoRedo=ed.undoManager;ed.startContent=ed.getContent({format:'raw'});tinyMCE.instances[ed.id]=ed;tinyMCE.loadedFiles=[];});ed.onActivate.add(function(){tinyMCE.settings=ed.settings;tinyMCE.selectedInstance=ed;});if(f.handleNodeChange){ed.onNodeChange.add(function(ed,cm,n){f.handleNodeChange(ed.id,n,0,0,false,!ed.selection.isCollapsed());});}if(f.onChange){ed.onChange.add(function(ed,n){return f.onChange(ed);});}if(f.cleanup){ed.onGetContent.add(function(){});}this.getInfo=function(){return f.getInfo();};this.createControl=function(n){tinyMCE.pluginURL=tinymce.baseURL+'/plugins/'+pn;tinyMCE.themeURL=tinymce.baseURL+'/themes/'+tinyMCE.activeEditor.settings.theme;if(f.getControlHTML)return f.getControlHTML(n);return null;};this.execCommand=function(cmd,ui,val){if(f.execCommand)return f.execCommand(ed.id,ed.getBody(),cmd,ui,val);return false;};};tinymce.PluginManager.add(pn,PluginWrapper);},_getDOM:function(){return tinyMCE.activeEditor?tinyMCE.activeEditor.dom:tinymce.DOM;},convertRelativeToAbsoluteURL:function(b,u){return new tinymce.util.URI(b).toAbsolute(u);},convertAbsoluteURLToRelativeURL:function(b,u){return new tinymce.util.URI(b).toRelative(u);}});tinymce.extend(tinymce.Editor.prototype,{getFocusElement:function(){return this.selection.getNode();},getData:function(n){if(!this.data)this.data=[];if(!this.data[n])this.data[n]=[];return this.data[n];},hasPlugin:function(n){return this.plugins[n]!=null;},getContainerWin:function(){return window;},getHTML:function(raw){return this.getContent({format:raw?'raw':'html'});},setHTML:function(h){this.setContent(h);},getSel:function(){return this.selection.getSel();},getRng:function(){return this.selection.getRng();},isHidden:function(){var s;if(!tinymce.isGecko)return false;s=this.getSel();return(!s||!s.rangeCount||s.rangeCount==0);},translate:function(s){var c=this.settings.language,o;if(!s)return s;o=tinymce.EditorManager.i18n[c+'.'+s]||s.replace(/{\#([^}]+)\}/g,function(a,b){return tinymce.EditorManager.i18n[c+'.'+b]||'{#'+b+'}';});o=o.replace(/{\$lang_([^}]+)\}/g,function(a,b){return tinymce.EditorManager.i18n[c+'.'+b]||'{$lang_'+b+'}';});return o;},repaint:function(){this.execCommand('mceRepaint');}});tinymce.extend(tinymce.dom.Selection.prototype,{getSelectedText:function(){return this.getContent({format:'text'});},getSelectedHTML:function(){return this.getContent({format:'html'});},getFocusElement:function(){return this.getNode();},selectNode:function(node,collapse,select_text_node,to_start){var t=this;t.select(node,select_text_node||0);if(!is(collapse))collapse=true;if(collapse){if(!is(to_start))to_start=true;t.collapse(to_start);}}});}).call(this);tinymce.PluginManager.add('compat2x',tinymce.plugins.Compat2x);})();