Help with wp_enqueue

Hi

I’m trying to add supersized via wp_enqueue and only on certain pages – but without much luck.

I’ve currently got the query in the footer with the following PHP – THIS WORKS..

<?php if ( !( is_page_template('modelPages.php') || is_archive() || is_single() || is_page_template('contactUsTemplate.php') ) ) { ?>
<script type="text/javascript" src="<?php echo bloginfo('template_directory');?>/scripts/supersized.3.2.7.min.js"></script>
<script type="text/javascript" src="<?php echo bloginfo('template_directory');?>/theme/supersized.shutter.min.js"></script>
<?php } ?>

However, trying to port that over to my functions file seems to just break super sized full stop…

function custom_scripts() {
	if ( !is_admin() ) {
	wp_deregister_script('jquery');
	wp_register_script('jquery', ("https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"), false);
	wp_enqueue_script('jquery');
}
if( is_page( 'home' ) ) :
	wp_enqueue_script(
	'jcarousel',
	get_template_directory_uri() . '/scripts/jquery.jcarousel.min.js',
	array( 'jquery' ),
	null,
	true
);
elseif( is_single() ) :
	wp_enqueue_script(
	'slimbox',
	get_template_directory_uri() . '/scripts/slimbox2.js',
	array( 'jquery' ),
	null,
	true
);
elseif( !(is_page_template('modelPages.php') || is_archive() || is_single() || is_page_template('contactUsTemplate.php')  )  ) :
    // SUPERSIZED SHOULD GO HERE BUT BREAKS
endif;
}    

add_action( 'wp_enqueue_scripts', 'custom_scripts' );

It just doesn’t load it at all – not even if i add it to the home rule.

Can someone please advise on what I’m doing wrong? I clearly am getting in a muddle about adding multiple enqueues to a rule…