Hi seanbugeja,
Yes, it can be tricky to get customizations to work.
The first thing we’ll need to do is make sure your custom posts loop template is working.
1. Copy the posts_loop_template file
Copy the file located at…
[site root]/wp-content/plugins/posts-in-page/posts_loop_template.php
… into your theme directory. In your case, I believe it should be located here:
[site root]/wp-content/themes/museum-core/posts_loop_template.php
2. Test your custom posts_loop_template
Sometimes I like to add some test code just to be sure it’s working. For example, I might add the word HELLO! to the title by changing the line…
<!-- This outputs the post TITLE -->
<h2 class="entry-title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
… to…
<!-- This outputs the post TITLE -->
<h2 class="entry-title">HELLO! <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
If it’s working, you should see HELLO! added to the beginning of every title in your list. If you don’t see that, we’ll need to investigate to see why.
3. Add thumbnail image
Once that’s working, add the following where you’d like to see the thumbnail. For example, you might add it just before the Title. We can tweak the location and styling once you know it’s working.
<!-- This will output of the featured image thumbnail -->
<div class="featured-image">
<?php the_post_thumbnail( 'thumbnail' ); ?>
</div>
<!-- This outputs the post TITLE -->
<h2 class="entry-title">HELLO! <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
4. Remove the line posted in: Author: Comments off
To remove this information, just delete the following.
<!-- This outputs the post 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', 'posts-in-page' ), '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', 'posts-in-page' ), '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', 'posts-in-page' ), __( '1 Comment', 'posts-in-page' ), __( '% Comments', 'posts-in-page' ) ); ?></span>
<?php edit_post_link( __( 'Edit', 'posts-in-page' ), '<span class="meta-sep">|</span> <span class="edit-link">', '</span>' ); ?>
</div>
<?php comments_template(); ?>
You should be left with your featured image, title, and excerpt after that.
I hope that helps!