function _savePps(&$raList) 
    {
        // Save each PPS WK
        for ($i = 0; $i < count($raList); $i++) {
            fwrite($this->_FILEH_, $raList[$i]->_getPpsWk());
        }
        // Adjust for Block
        $iCnt = count($raList);
        $iBCnt = $this->_BIG_BLOCK_SIZE / OLE_PPS_SIZE;
        if ($iCnt % $iBCnt) {
            for ($i = 0; $i < (($iBCnt - ($iCnt % $iBCnt)) * OLE_PPS_SIZE); $i++) {
                fwrite($this->_FILEH_, "\x00");
            }
        }
    }