private static void AddSubitemsToControl(XmlNode subItemsNode, GUIControl control)
        {
            XmlNodeList subNodes = subItemsNode.SelectNodes("subitems/subitem/text()");

            foreach (XmlNode subNode in subNodes)
            {
                string strSubItem = subNode.Value;
                if (Char.IsDigit(strSubItem[0]))
                {
                    GUILocalizeStrings.LocalizeLabel(ref strSubItem);
                }
                control.AddSubItem(strSubItem);
            }
        }