Custom Smileys is a WordPress plugin that allow you to set up your own collection of smileys and use it in your posts/ comments. Youâ€™re able to change the display settings, the â€™shortcutsâ€™ to call the smileys and almost everything.
Itâ€™s easy-to-use and easy-to-install. Working perfectly with WordPress 1.5.
You can get it here: http://lazyanduseless.belike.net/wp/?p=31