How to access from node template a field added by module
I managed to figure it out. I found a location in the module with this code.

function theme_featured_node_image($variables) {
  $fid = $variables['element']['#db_values']['image'];
  $file = file_load($fid);
  $url = file_create_url($file-&gt;uri);
  return theme('image', array('attributes' =&gt; array(), 'path' =&gt; $url));
}


Then I wrote

$file = file_load($featured_node[0]['image']);
$url = file_create_url($file-&gt;uri);
print '&lt;img src="'.$url.'"&gt;';


Which allowed me to print the image.