Searching for something totally unrelated, I stumbled upon an amazing theme pack created by Izo called "SHI10 GTK Linux Suite". It includes a GTK theme, two Emerald themes, a DockBarX theme, a GnoMenu theme, icon theme for the desktop, docks and so on as well as wallpapers and an Avant Window Navigator theme.
To find out how to install each of the themes included in this pack, see the README in each folder.