This is the latest version 0.4 for Sunset. If you don't see this select "0.4-sunset" under "VERSION ROLLBACK" on the sidebar.
I have learnt elsewhere similar act such as that from the NewZen theme which uses a set of 6 files (prototype.js moo.fx moo.fx.pack prototype.lite etc). dhtmlgoodies's way is much cleaner in the sidebar.php and CSS.
I have yet to try again changing the default div class names to something easier to type and meaningful such that if you download this theme to play with you will feel more comfortable.