for the ribbon lightbox gallery, you need to set the width of the thiumbnail ribbon to fit in the space you have available.
in the galleries/ribbon_lightbox/css/common.css, edit the following class:
.pg-rl .ribbon .thumbs-wrapper {
padding: 9px 10px 9px 1px;
background-color: #303030;
border-top: none;
overflow: hidden;
height: 70px;
width: 791px;
float: left;
}
and change the width to 500px:
for the slideshow wide gallery, you need to edit the galleries/slideshow_wide/index.php file, in the image tag:
<img <?php echo($i==0?"":'class="startHidden"'); ?> src="<?php echo($gallery['images'][$i]['fullsize']['url']); ?>" alt="<?php echo((strlen($gallery['images'][$i]['title']) > 0 ? '<span>' . str_replace("\n","",$gallery['images'][$i]['title']) . ':</span> ' : '') . preg_replace("/[\r\n]*/","",$gallery['images'][$i]['description'])); ?>" width="958" height="220px"/>
you need to edit the width:
width="958"
you can set this to use 550 as well:
width="550"
or experiment to find the width that works best for you.