I never tried, but I guess you can do it like that : 

    $form['#attached']['js'] = array(
      array(
        'data' => drupal_get_path('module', 'radio86_media') . '/select_media.js',
        'type' => 'file'
      ),
      array(
        'data' => array('radio86_media' => array('barfoo' => 'booboo')),
        'setting'
      )
    );

According the [documentation][1] you should be able to add settings and files.


  [1]: http://api.drupal.org/api/drupal/developer--topics--forms_api_reference.html/7#attached