Blue Phoenix

Thanks for the steer, really helped and managed to find a working solution

<?php
            $display_count = 5;
            $page = (get_query_var('paged')) ? get_query_var('paged') : 1;
            $offset = ($display_count * ($page - 1)) + 1;

            $args=array(
            'caller_get_posts'=>1,
            'orderby' => 'title',
            'order'   => 'DESC',
            'posts_per_page' => $display_count,
            'page'       =>  $page,
	        'offset'     =>  $offset
        );
            $my_query = new WP_Query($args);
            if( $my_query->have_posts() )  {
            while ($my_query->have_posts()) : $my_query->the_post(); ?>
                <article class="row sub-article">
                    <a href="<?php the_permalink();?>" title="<?php the_title();?>">
                        <div class="col-xs-4">
                            <?php the_post_thumbnail('secondary-thumb', array('class' => 'img-responsive')); ?>
                        </div>
                        <div class="col-xs-8">
                            <h4><?php the_title();?></h4>
                        </div>
                    </a>
                </article>

            <?php endwhile;} ?>
            <?php next_posts_link(); ?>
            <?php previous_posts_link(); ?>
            <?php wp_reset_postdata(); ?>

Functions.php has this

function my_attachments( $attachments )
{
$args = array(

// title of the meta box (string)
'label' => 'My Attachments',

// all post types to utilize (string|array)
'post_type' => array( 'post', 'page', 'portfolio' ),

// allowed file type(s) (array) (image|video|text|audio|application)
'filetype' => image, // no filetype limit

// include a note within the meta box (string)
'note' => 'Attach files here!',

// text for 'Attach' button in meta box (string)
'button_text' => __( 'Attach Files', 'attachments' ),

// text for modal 'Attach' button (string)
'modal_text' => __( 'Attach', 'attachments' ),

/**
* Fields for the instance are stored in an array. Each field consists of
* an array with three keys: name, type, label.
*
* name - (string) The field name used. No special characters.
* type - (string) The registered field type.
* Fields available: text, textarea
* label - (string) The label displayed for the field.
*/

'fields' => array(
array(
'name' => 'title', // unique field name
'type' => 'text', // registered field type
'label' => __( 'Title', 'attachments' ), // label to display
),
array(
'name' => 'caption', // unique field name
'type' => 'textarea', // registered field type
'label' => __( 'Caption', 'attachments' ), // label to display
),
array(
'name' => 'copyright', // unique field name
'type' => 'text', // registered field type
'label' => __( 'Copyright', 'attachments' ), // label to display
),
),

);

$attachments->register( 'my_attachments', $args ); // unique instance name
}

add_action( 'attachments_register', 'my_attachments' );

With in the loop of single-portfolio.php the following is added

<?php $attachments = new Attachments( 'attachments' ); /* pass the instance name */ ?>
<?php if( $attachments->exist() ) : ?>

    <?php while( $attachments->get() ) : ?>
		<img src="<?php echo $attachments->src( 'full' ); ?>"/>

    <?php endwhile; ?>

<?php endif; ?>

Let me know if anything else is required

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