1) Customize script.sh. You should load script.sh before compiling or
   executing gTopLevel
2) Customize gTopLevel.ml and rootcontent.xsl in order to make them communicate.
3) Check out the "stylesheets" and "meta_stylesheets" directories from the
   MoWGLI CVS repository.
4) Type "make" to compile to bytecode and "make opt" to compile to nativecode.

Enjoy!

Note:
 Every time that you upgrade stylesheets, you should "rm -rf" the styles
 directory and do make again.