silverstripe-frameworktest/code/sifr/SifrPage.php

<?php 
class SifrPage extends Page {
	
	function getCMSFields() {
		$fields = parent::getCMSFields();
		$fields->addFieldToTab("Root.Content.SifrSampleImage", new LiteralField("SifrSampleImage", '<p><img src="frameworktest/images/sifr_sample.png"/></p>'));
		
		return $fields;
	}
	
}

class SifrPage_Controller extends Page_Controller {
	
	function init() {
		parent::init();
		
		Sifr::add_font('blackout', 'themes/fonts/blackout.swf');
		Sifr::replace_element('blackout', 'h2', "'.sIFR-root { text-align: left; color: red;'");
		Sifr::replace_element('blackout', 'h3', "'.sIFR-root { text-align: left; color: red;'");
		Sifr::replace_element('blackout', 'h4', "'.sIFR-root { text-align: left; color: red;'");
		Sifr::activate_sifr();
	}
}