public function PDO($DsnOrPDO = NULL, $Username = NULL, $Password = NULL) {
		if(!is_null($DsnOrPDO)) {
			if($DsnOrPDO instanceof PDO)
				$this->_PDO = $DsnOrPDO;
			else {
				$this->_PDO = new PDO($DsnOrPDO, $Username, $Password);
				if(strncasecmp($DsnOrPDO, 'mysql', 5) == 0)
					$this->_PDO->exec('set names utf8');
			}
		}
		return $this->_PDO;
	}