<reference name="before_body_end">
        <action method="unsetChild"><name>global_cookie_notice</name></action>
    </reference>

    <reference name="after_body_start">
        <block type="page/html_cookieNotice" name="global_cookie_notice" as ="global_cookie_notice" template="page/html/cookienotice.phtml" before="-" />
    </reference>`

$block = Mage::getModel('cms/block')->load($blockIdentifier, 'identifier');

$block = Mage::getModel('cms/block')->setStoreId(Mage::app()->getStore()->getId())->load($blockIdentifier, 'identifier');

$content = "<p>This website requires cookies to provide all of its features. For more " .
    "information on what data is contained in the cookies, please see our " .
    "<a href="{{store direct_url="privacy-policy-cookie-restriction-mode"}}">Privacy Policy page</a>. " .
    "To accept cookies from this site, please click the Allow button below.</p>";

$cmsBlock = array(
    'title'         => 'Cookie restriction notice',
    'identifier'    => 'cookie_restriction_notice_block',
    'content'       => $content,
    'is_active'     => 1,
    'stores'        => 0
);

Mage::getModel('cms/block')->setData($cmsBlock)->save();