Wordpress - custom comments.php file

<div class="comentarios">
    <h4>Comentarios</h4>

<?php if ( have_comments() ) : ?>


                <?php   wp_list_comments('type=comment&callback=ominid_comment');
                ?>


<?php else : // or, if we don't have comments:

    /* If there are no comments and comments are closed,
     * let's leave a little note, shall we?
     */
    if ( ! comments_open() ) :
?>
    <p class="nocomments"><?php _e( 'Comments are closed.', 'twentyten' ); ?></p>
<?php endif; // end ! comments_open() ?>

<?php endif; // end have_comments() ?>
<?php
$commenter = wp_get_current_commenter();

$fields =  array(
    'author' => '<input id="nombre" name="author" type="text" value="'.__( 'Name' ).'" size="30"' . $aria_req . ' />',
    'email'  => '<input id="email" name="email" type="text" value="'.__( 'Email' ).'" size="30"' . $aria_req . ' />',
    'url'    => '<input id="url" name="url" type="text" value="'.__( 'Website' ).'" size="30" />'
);
$defaults = array(
    'fields' => $fields,
    'label_submit' => 'Enviar comentario',
    'comment_notes_after' => null,
    'comment_notes_before' => null,
    'comment_field' => '<label for="comment">' . _x( 'Comment', 'noun' ) . '<textarea id="comment" name="comment" cols="45" rows="8" aria-required="true">Comentario</textarea></label>',
    'title_reply' => comment_form_title(false,false,false)
); ?>
<div class="form-respuesta">
    <?php comment_form($defaults); ?>
</div>

</div>