Install Script for Magento static blocks

data-script.php

<?php
    /** @var Mage_Cms_Model_Block $oLoadedCmsBlock */
    $oCmsBlockModel = Mage::getModel('cms/block')->setStoreId($aBlockData['stores'])->load($aBlockData['identifier']);

    $bDoesStoreMatchCurrentBlockStore = $aBlockData['stores'] === (int)$oCmsBlockModel->getStoreId()[0];
    if($oCmsBlockModel->getId() && $bDoesStoreMatchCurrentBlockStore) {
        // update block
        $oCmsBlockModel->setContent($aBlockData['content']);
    } else {
        // save new block
        $oCmsBlockModel->setData($aBlockData);
    }
    
    $oCmsBlockModel->save();
    $oCmsBlockModel->clearInstance();
?>