private static function __getCloudFrontDistributionConfigXML($bucket, $enabled, $comment, $callerReference = '0', $cnames = array(), $defaultRootObject = null, $originAccessIdentity = null, $trustedSigners = array())
	{
		$dom = new DOMDocument('1.0', 'UTF-8');
		$dom->formatOutput = true;
		$distributionConfig = $dom->createElement('DistributionConfig');
		$distributionConfig->setAttribute('xmlns', 'http://cloudfront.amazonaws.com/doc/2010-11-01/');

		$origin = $dom->createElement('S3Origin');
		$origin->appendChild($dom->createElement('DNSName', $bucket));
		if ($originAccessIdentity !== null) $origin->appendChild($dom->createElement('OriginAccessIdentity', $originAccessIdentity));
		$distributionConfig->appendChild($origin);

		if ($defaultRootObject !== null) $distributionConfig->appendChild($dom->createElement('DefaultRootObject', $defaultRootObject));

		$distributionConfig->appendChild($dom->createElement('CallerReference', $callerReference));
		foreach ($cnames as $cname)
			$distributionConfig->appendChild($dom->createElement('CNAME', $cname));
		if ($comment !== '') $distributionConfig->appendChild($dom->createElement('Comment', $comment));
		$distributionConfig->appendChild($dom->createElement('Enabled', $enabled ? 'true' : 'false'));

		$trusted = $dom->createElement('TrustedSigners');
		foreach ($trustedSigners as $id => $type)
			$trusted->appendChild($id !== '' ? $dom->createElement($type, $id) : $dom->createElement($type));
		$distributionConfig->appendChild($trusted);

		$dom->appendChild($distributionConfig);
		//var_dump($dom->saveXML());
		return $dom->saveXML();
	}