The most important one (beer mug) isn't working for me! :(

These smileys are based on the free set at http://www.33smiley.com/ There are many more that are not included in this set. You can create your own custom smiley sets by downloading the GIFs. Giving them transparent backgrounds would require a LOT of work editing the animations frame-by-frame. Whoever made them is very talented though.