Post in Page plugin with Shamrock Theme

Due to my utter lack of unsuccessful tries with this plugin getting to work with the Shamrock theme, I have come here to get some help.

I’ve have used this shortcode in a page.
[ic_add_posts category='Dutch' paginate='yes' template='wp-content/themes/shamrock/posts_loop_template.php']

It does retrieve all the posts with the catorgory “Dutch”, so that’s a plus. But when I’ve tried multiple things to try to get it to adjust to my theme “Shamrock”. Post.loop.template.php is in my theme directory with the following code.

<!-- NOTE: If you need to make changes to this file, copy it to your current theme's main
	directory so your changes won't be overwritten when the plugin is upgraded. -->

<!-- Start of Post Wrap -->
<div class="post hentry ivycat-post">

	<!-- This is the output of the post TITLE -->
	<h2 class="entry-title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>

	<!-- This is the output of the excerpt -->
	<div class="entry-summary">
	<!-- This will output of the featured image thumbnail  -->
		<div class="featured-image">
			<a href="<?php the_permalink(); ?>">
				<?php the_post_thumbnail( array(180,9999), array('class' => 'alignleft')); ?>
			</a>
		</div>
		<?php the_excerpt(); ?>
	</div>

	<!-- This is the output of the META information -->
	<div class="entry-utility">
		<?php if ( count( get_the_category() ) ) : ?>
			<span class="cat-links">
				<?php printf( __( '<span class="%1$s">Posted in</span> %2$s', 'shamrock' ), 'entry-utility-prep entry-utility-prep-cat-links', get_the_category_list( ', ' ) ); ?>
			</span>
			<span class="meta-sep">|</span>
		<?php endif; ?>
		<?php
			$tags_list = get_the_tag_list( '', ', ' );
			if ( $tags_list ):
		?>
			<span class="tag-links">
				<?php printf( __( '<span class="%1$s">Tagged</span> %2$s', 'shamrock' ), 'entry-utility-prep entry-utility-prep-tag-links', $tags_list ); ?>
			</span>
			<!--<span class="meta-sep">|</span> -->
		<?php endif; ?>
		<!--<span class="comments-link"><?php comments_popup_link( __( 'Leave a comment', 'shamrock' ), __( '1 Comment', 'shamrock' ), __( '% Comments', 'shamrock' ) ); ?></span>-->
		<?php edit_post_link( __( 'Edit', 'twentyten' ), '<span class="meta-sep">|</span> <span class="edit-link">', '</span>' ); ?>
	</div>

</div>
<!-- // End of Post Wrap -->

I’ve tried adding things to it and deleting, but still nothing works. Maybe it’s all the class summaries within the code. I must confess, they don’t exists in my css files, if I’m being honest. But I don’t know where I should put them and what kind of style I should include to make it work.

Can anyone help me fix this? I’ve got some knowledge about html and css, but no php knowledge, other than copying code into the files.

I hope someone can help me.