Hello,
I had a similar problem with posts. I wanted to show the number of published posts in a post and I wanted this number to be updated every time I publish a new post. The solution was to use a keyword (something like, for instance, [LAST_COMMENTS]) and replace that keyword later with filters and actions.
But with WP Carousel you have it easier. First, select a keyword, for instance, [LAST_COMMENTS]. Then modify your WP Carousel’s theme and replace this line:
<?php foreach ($items as $i_id => $item): ?>
With these three lines:
<?php foreach ($items as $i_id => $item): ?>
<?php $replacement = '<ol class="commentlist">'.wp_list_comments(array('style' => 'ol')).'</ol>'; ?>
<?php str_replace('[LAST_COMMENTS]', $replacement, $item['DESC']); ?>
The only problem you will get is that wp_list_comments prints by default the comments (instead of returning them), so you need to set a callback function to return the content in order to allow the variable $replacement to store the comments. You have more info about this in the codex.
