Hey,
If you want to change the font you shouldn't be messing around with the quicksand.font.js file, only the CSS file needs editing.
Open up style.css, find the body tag (very near the top) and replace this:
font-family: Arial, Helevtica, Verdana, sans-serif;
with this:
font-family: "Times New Roman", serif;
To disable Cufon completely, open up /framework/helper_functions/header_includes.php and remove:
$cufon = get_bloginfo('template_url')."/js/cufon.js";
wp_enqueue_script('cufon',$cufon,array('jquery'));
$quicksand = get_bloginfo('template_url')."/js/quicksand.font.js";
wp_enqueue_script('quicksand',$quicksand,array('jquery'));
James