' WP-Paginate ' and Custom Templates …. Help!

I had created a Custom Gallery Template, I want to only have 20 images per page. So what I wanted to do, is use the WP-Paginate.

So my question is, can I use it within a Custom Template, and if so, how?

I am open to other suggestions if I can get the same result.

Here is the code to my Custom Template:

<?php
	/*
	Template Name: Gallery Template
	*/
 ?>

<?php get_header(); ?>

	<?php if (have_posts()) : while (have_posts()) : the_post(); ?>

		<article class="post" id="post-<?php the_ID(); ?>">

			<h2><?php the_title(); ?></h2>

		</article>

        <?php endwhile; endif; ?>

<?php get_footer(); ?>