structure theme with page

Can someone help me structure theme to page, the fim_photos.php use its own default template structure. i need to tweak that default structure to match the structure of the WordPress theme i am gonna use, not sure how to do this.

page https://www.koddinn.com
gallery page, trying to fix https://www.koddinn.com/myndir

here is the fim_photos.php

<?php define('FIM', true); ?>

<?php include("../../../wp-blog-header.php"); ?>
<?php require_once("functions/fim_functions.php"); ?>

<?php get_header(); ?>

<div id="content" class="narrowcolumn">

		<div class="entry">
			<?php echo fim_get_the_content(); ?>
		</div>
</div>
<?php get_sidebar(); ?>

<?php get_footer(); ?>

i need to let it look like the structure of the theme i am gonna use. page.php

<?php get_header(); ?>
		<div class="main-narrow">

			<?php if(have_posts()) : ?><?php while(have_posts()) : the_post(); ?>
			<div class="post" id="post-<?php the_ID(); ?>">
				<h2><a href="<?php the_permalink(); ?>" rel="bookmark" title="<?php the_title(); ?>"><?php the_title(); ?></a></h2>
				<div class="entry">

					<?php the_content(); ?>
					<?php link_pages('<strong>Pages:</strong> ', '
', 'number'); ?>

					<?php edit_post_link('Edit', '', '
'); ?>

					<!-- <?php trackback_rdf(); ?> -->

				</div>

				<div class="comments-template">
					<?php comments_template(); ?>
				</div>

			</div>
			<?php endwhile; ?>

			<?php else : ?>
			<div class="post">
				<h2><?php _e('404 Error: Not Found'); ?></h2>
			</div>
			<?php endif; ?>

		</div>

<?php get_footer(); ?>