http://kmeleonbrowser.org/forum/read.php?f=1&i=23770&t=23770
will give you some info.
& part of the default folder, reduced chrome and some km plugins.
most of the rest can be taken from a Mozilla GRE install. and a mozilla browser xpi.
that will give You the esential files only. a list of essentials is at embed project. k-m is allready very close to minimum.
http://lxr.mozilla.org/seamonkey/source/embedding/
regards