def METHOD_NAME(self):
	group = self.add_option_group('configure options')
	group.add_option('--download', dest='download', default=False, action='store_true', help='try to download the tools if missing')
	group.add_option('--use-config', action='store', default=None,
					 metavar='CFG', dest='use_config',
					 help='force the configuration parameters by importing '
						  'CFG.py. Several modules may be provided (comma '
						  'separated).')
	group.add_option('--use-config-dir', action='store', default=DEFAULT_DIR,
					 metavar='CFG_DIR', dest='use_config_dir',
					 help='path or url where to find the configuration file')