Wizard Plugin Processor

/* ---------- form info -------- */
    'forms' => array(
      'introduction' => array(
        'path' => "forms/review-introduction.inc",
        'form id' => 'autocar_form_review_introduction',
      ),
    ),

/* plugin processor */

foreach ($forms as $step => $info) {
  $info['include'] = $plugin['path'] . '/' . $info['path'];
  unset($info['path']);
}