WordPress.org

1. Unzip archive to the '/wp-content/plugins/' directory.
2. Activate the plugin through the 'Plugins' menu in WordPress.

emoticons:

In 'comments.php' file add the following scripts: <?php highslide_emoticons(); ?> (Close the emotion window when somebody select a smiley.) OR <?php highslide_emoticons(true); ?> (Holds the emotion window open when somebody select a smiley.)