‘exclude’ pages in functions.php file

I am using a theme that is a child of Hybrid, and I found the array that I need to edit to get the effect that I want. I want to have two lines of navigation, but only have 3 pages in one navbar, while I have the rest in the 2nd navbar.

The top nav bar has a home link & “contact” link. The array for that is in the original Hybrid theme in the hooks-filters.php file. It looks like this:

function news_cat_nav() {

	$args = array(
		'style' => 'list',
		'hide_empty' => true,
		'exclude' => 192,
		'use_desc_for_title' => false,
		'depth' => 4,
		'hierarchical' => true,
		'echo' => false,	// Leave as is.
		'title_li' => false,	// Leave as is.
	);

	echo "\n\t<div id='cat-navigation'>\n\t\t";

	echo '<div id="cat-nav" class="cat-nav"><ul class="menu sf-menu">' . str_replace( array( "\t", "\n", "\r" ), '', wp_list_pages( $args ) ) . '</ul></div>';

	echo '<div id="feed"><ul>';
	echo '<li class="feed-url"><a href="' . get_bloginfo( 'rss2_url' ) . '" title="' . __('Subscribe to the feed', 'news') . '">' . __('Subscribe', 'news') . '</a></li>';
	echo '</ul></div>';

	echo "\n\t</div>\n";
}

This currently works, and excludes 192, but I would like to add a second page number (538) to the ‘exclude’ line, but when I change it to 'exclude' => 192,538, it breaks.

Can someone help me figure out how to edit this? Thanks!!!

(Actually I am using 2.9.2, but the drop-down doesn’t offer that option.)