This is a very quick example as I've only just started using HTML_QuickForm_Controller, but this should hopefully get updated more later. Basically the trick is to call $fb->useForm($this); and $fb->getForm(); to populate the elements on the page.

<code php>
<?php

require_once('HTML/QuickForm.php');
require_once('HTML/QuickForm/Controller.php');
require_once('DB/DataObject/FormBuilder.php');
require_once('DB/DataObject/FormBuilder/QuickForm.php');

class FormBuilderPage extends HTML_QuickForm_Page
{
  function buildForm()
  {
    $this->_formBuilt = true;
    $do =& DB_DataObject::factory('table');
    $do->fb_addFormHeader = false;
    //this is important
    $do->fb_createSubmit = false;
    $fb =& DB_DataObject_FormBuilder::create($do);
    $fb->useForm($this);
    $fb->getForm();
    $this->addElement('submit', $this->getButtonName('next'), 'Next >>');
  }
};
$cont =& new HTML_QuickForm_Controller('FBController');
$cont->addPage(new FormBuilderPage('FBPage'));
$cont->run();
?>
</code>