Hardcoding a Slideshow

<?php

//if you uploaded the images under Slideshow > Manage Slides
if (class_exists('Gallery')) {
    $Gallery = new Gallery();
    $Gallery -> slideshow($output = true, $post_id = null);
}

//if you uploaded the images to a WordPress POST and the post ID is 123
if (class_exists('Gallery')) {
    $Gallery = new Gallery();
    $Gallery -> slideshow($output = true, $post_id = 123);
}

?>