Block won't display on teasers, shows below comments on full

1. regarding the front page. The jCarousel block will not show as it's not a single node and the block don't know where to find the images. I understand you probably want to have a block under each node's teaser, reading images from each node. however that functionality seems needs more works then the current module can do. You may achieve that by do some code in the theme/templates, but it will need some effort.

2. again, it's a theme issue, you can have a look at http://drupal.org/node/283450 (place content/blocks before comments). It's for Drupal 5. But you can do similar thing in Drupal 6. I'll try it here:

yourtheme.info, add the following:

regions[left] = Left sidebar
regions[right] = Right sidebar
regions[content] = Content
regions[header] = Header
regions[footer] = Footer
regions[content_bottom] = Content bottom

node.tpl.php

  <div class="node<?php if ($sticky) { print " sticky"; } ?><?php if (!$status) { print " node-unpublished"; } ?>">
    <?php if ($picture) {
      print $picture;
    }?>
    <?php if ($page == 0) { ?><h2 class="title"><a href="<?php print $node_url?>"><?php print $title?></a></h2><?php }; ?>
    <span class="submitted"><?php print $submitted?></span>
    <span class="taxonomy"><?php print $terms?></span>
    <div class="content"><?php print $content?></div>
    <?php if ($links) { ?><div class="links">&raquo; <?php print $links?></div><?php }; ?>

    <!-- the new region in a div -->
    <div class="content_bottom"><?php print $content_bottom; ?></div>
  </div>

notice the content_bottom region will be at the end of a node, or, in other words, before comments.

remember clear cache to make the region work. (admin/settings/performance)

put the jCarousle block to the content_botton region. (admin/build/blocks)

that should work.