Using The Avant Window Navigator (AWN) On Fedora 7 - Page 2
4.1.4 Glass Engine
Here you can adjust the colors for the glass effects.
4.1.5 Muster Engine
You can select a background image for your bar if you want. Transparency is supported.
In this window you can add or remove applets. Select the applet you want to add or remove and click on the corresponding button.
The applet "Awn Main Menu" for example:
Here you can create or remove launchers.
There are a few themes available on http://wiki.awn-project.org/index.php?title=Themes. If you found a theme that you like, download it (don't unpack it afterwards) and import it within this window.