http://www.malfunction.de/afterstep/files/NeXT_XEmacs.tar.gz contains icons
replacing the default black-white ones (I don't use the buttonbar, but this
icons are looking very nice). Perhaps the icons can be placed into extra
package's so the user can choose between the default and enhanced ones.
They would crash with the ordinary icons, and they are too color hungry to be
used by default.