Someone

function cv_helper_form_alter($form_id, &$form_values) {
	global $user;

	if ($form_id == 'cv_node_form') {
		/* check if this user have a cv node */
		if (arg(1) == 'add' && $node = node_load(array('type' => 'cv', 'uid' => $user->uid))) {
			drupal_goto('node/'. $node->nid .'/edit');
		} else {
			/* Create the cv node */
			$form_values['title']['#default_value'] = $user->name . ' CV';
			$form_values['field_anvndare'][0]['user_name']['#default_value'] = $user->name;
			node_form_submit($form_id, $form_values);
		}
                ...
                ...
         }
}