Adding to the Header

hey i need to add a few scripts to the template or as an override some where this is what i need to insert i'm some conflicts with a compoent, and i can't seem to figure out where to add it any ideas? best

$document->addStyleSheet('media/jui/css/bootstrap-responsive.min.css');
$document->addStyleSheet('media/jui/css/bootstrap.min.css');
$document->addScript('media/jui/js/jquery.js');
$document->addScript('media/jui/js/bootstrap.js');

If you need to add elements to <header> area of website you will this part in layouts/blocks/head.php file so the code should be inserted there.