$path = 'carriers/tablerate/active';
$config = Mage::getModel('core/config_data')->load($path, 'path');
$config->setValue('1')->setPath($path);
$config->save();

$block = Mage::getModel('cms/block');
$block->setTitle('Some title here');
$block->setIdentifier('identifier_here');
$block->setContent('This is the content');
$block->setStatus(1);//enabled
$block->setStores(array(0)); //make it available in all stores
$block->save();