DirectoryTree:

|- core.ini
|- core.php
|- www (Web-Directoryroot, index.php)
|	| style.css
|	|- gfx
|	|	|-default
|	|- public (public files)
|	|- resources (Javascript etc)
|- modules (ApplicationModules)
|	|- file_loader (ex.)
|- templates (ApplicationTemplates)
|	|-default
|	|	| structure-files
|	|	|- file_loader (ex.)
|	|- print
|	|	| structure-files
|	|	|- file_loader (ex.)
|- library (LibraryPackages)
|- cache
|- configs (all ConfigurationFiles except core.ini)

A sample installed tree can be seen here:
http://svn.oss.backendmedia.com