      */
     override public function setChildIndex(child:DisplayObject, index:int):void
     {
-        throw(new Error("setChildIndex is not available in FxComponent. " + 
-                "Instead, modify the skin directly or setItemIndex."));
+        throw(new Error(resourceManager.getString("components", "setChildIndexError")));
     }
     
     /**

     */
    override public function addChildAt(child:DisplayObject, index:int):DisplayObject
    {
        throw(new Error("addChildAt is not available in FxComponent. " + 
                "Instead, modify the skin directly or use addItemAt."));
    }
    
    /**

                if (part.required)
                {
                    if (!(part.id in skin) || skin[part.id] == null)
                        throw(new Error(resourceManager.getString("components", "requiredSkinPartNotFound", [part.id])));
                }
                
                if (part.id in skin)
