Custom jQuery scroll
is your function called ?
put a drupal_set_message('hello'); in it to see.

remove these to lines, they're not needed

$vars['script'] = drupal_get_js();
$vars['styles'] = drupal_get_css();


then - you need to add some custom JS, where you tell which of your div should be modified:

drupal_add_js('jQuery(document).ready(function () { $("#logoParade").smoothDivScroll({ 
    autoScrollingMode: "always", 
    autoScrollingDirection: "endlessLoopRight", 
    autoScrollingStep: 1, 
    autoScrollingInterval: 25 
});

// Logo parade event handlers
$("#logoParade").bind("mouseover", function() {
    $(this).smoothDivScroll("stopAutoScrolling");
}).bind("mouseout", function() {
    $(this).smoothDivScroll("startAutoScrolling");
}); });', 'inline')


is this div already setup ?

else - add it in page.tpl.php or whereever you like to ..