WordPress.org

Installation is easy:

1. Upload DG_Random_Image folder and it's contents to /wp-content/plugins/ directory
2. Activate the plugin through the 'Plugins' menu in WordPress
3. Place <?php echo DG_Random_Image(array('title' => 'Gallery', 'class' =>'alignleft', 'x' => 125, 'y' => 125); ?> in your templates