How to Create Subfolders within Subfolders in SharePoint 2007 via the Lists.asmx Web Service

I did an entry on the deletion of folders via the Lists.asmx web service back in July 2008 which can be found here (http://ddkonline.blogspot.com/2008/07/deleting-folders-in-moss-via-web.html) - but I failed to include how to create folders using the same UpdateListItems() mechanism.

A sample of creating a folder and subfolders within SharePoint 2007 lists can be found below:

/// <summary>
        /// As checked in U2U CAML query builder, this is valid in 
        /// <Batch PreCalc='TRUE' OnError='Continue' RootFolder='/Purchase Order Forms V2'>
        ///<Method ID='1' Cmd='New'><Field Name='ID'>New</Field><Field Name='FSObjType'>1</Field><Field Name='BaseName'>DDkTest2</Field></Method></Batch>
        /// THIS Works for Subfolders
        /// <Batch PreCalc='TRUE' OnError='Continue' RootFolder='/Purchase Order Forms V2/2010_01_January'>
        /// <Method ID='1' Cmd='New'><Field Name='ID'>New</Field><Field Name='FSObjType'>1</Field><Field Name='BaseName'>DDkTest2</Field></Method></Batch>
        /// </summary>
        private void CreateFolder(string listName, string rootSubFolderName, string newFolderName)
        {
            ListsSoapClient client = new ListsSoapClient(); //TODO: Change to use WCF Client Factory

            //Correct invalid characters
            newFolderName = newFolderName.Replace(":", "_");
            string rootFolder = rootSubFolderName.Length > 0 ? string.Format("/{0}/{1}", listName, rootSubFolderName) : listName;
            string xmlCommand = string.Format("<Method ID='1' Cmd='New'><Field Name='ID'>New</Field><Field Name='FSObjType'>1</Field><Field Name='BaseName'>{1}</Field></Method>", rootFolder, newFolderName);
            client.ClientCredentials.UserName.UserName = ConfigHelper.SharePointServiceUserName;
            client.ClientCredentials.UserName.Password = ConfigHelper.SharePointServicePassword;
            XmlDocument doc = new XmlDocument();
            System.Xml.XmlElement batchNode = doc.CreateElement("Batch");
            batchNode.SetAttribute("OnError", "Continue");
            //Insert / to front as it is required by web service.
            if  (!rootFolder.StartsWith("/"))
                rootFolder = string.Format("/{0}",rootFolder);

            batchNode.SetAttribute("RootFolder", rootFolder);
            batchNode.InnerXml = xmlCommand;
            XmlNode resultNode = client.UpdateListItems(listName, batchNode;
        }