sf1.4 fckeditor trick

// in ckfinder's config.php file

require_once(dirname(__FILE__).'/../../../config/ProjectConfiguration.class.php');

$configuration = ProjectConfiguration::getApplicationConfiguration('frontend', 'prod', false);

// set 'current_form_upload_dir' to user's session
$formDir = sfContext::createInstance($configuration)->getUser()->getAttribute('current_form_upload_dir');

$baseUrl = '/uploads/'.$formDir.'/';