Dear all.
As long as config.php is included from a file in the
top-level directory (it is. from include.php). root_path
could be guessed as follows (windows-safe):
$config['root_path'] = dirname(__FILE__).'/';
if (DIRECTORY_SEPARATOR!='/')
# for windows
$config['root_path'] = str_replace('\\', '/', dirname(__FILE__)).'/';
Take care.
Arne <zonk@matfyz.cz>