public function addSection( $sectionName )
	{
		if( !$this->usesSections() )
			throw new RuntimeException( 'Sections are disabled' );
		$lines		= FS_File_Reader::loadArray( $this->fileName );
		$lines[]	= "[".$sectionName."]";
		if( !in_array( $sectionName, $this->sections ) )
			$this->sections[] = $sectionName;
		$result		= FS_File_Writer::saveArray( $this->fileName, $lines );
		$this->read();
		return is_int( $result );
	}