doxygen examples

http://www.stack.nl/~dimitri/doxygen/results.html

five nice examples are listed there:
1. KDevelop API Documentation
http://kdevelop.org/HEAD/doc/api/html/
It is a beautiful documentation, I wonder how to generate it by doxygen. Till now, I only knew it is possible to modify the cofigure for doxygen, it still seems impossible for me to gernerate such a smart documentation.
Maybe we can start to look for the answer from here:
http://www.stack.nl/~dimitri/doxygen/starting.html#extract_all
then, devote ourselves to the configuration for more detail, pay more attention to the HTML related options, such as HTML_HEADER, HTML_FOOTER and HTML_STYLESHEET:
http://www.stack.nl/~dimitri/doxygen/config.html
a friendly GUI front-end Doxywizard might be very useful:
http://www.stack.nl/~dimitri/doxygen/doxywizard_usage.html

2. The Xerces C++ Documentation
http://xml.apache.org/xerces-c/apiDocs/index.html
This example customize the web style, but do not contains more content in main page.

3. D-Bus documentation
http://dbus.freedesktop.org/doc/api/html/index.html
4. Yahoo Music Engine
http://plugins.yme.music.yahoo.com/plugins/docs/
5. IBM's International Component for Unicode
http://icu.sourceforge.net/apiref/icu4c/

These three examples all customize the main pages and show some extra item on the navigation bar. The fourth one also customize footer .

I guess that the main page that doxygen grenerates for some project might depend on the comments in the project. Here is the good start point to start document the source :
http://xml.apache.org/xerces-c/apiDocs/index.html

Tips:
.how to set the configuration to customize the html page?
.how to document for the main page or overview page?