tdanyo, i had a peek at:
https://imaginationmedia.tv/services/test
and found that you have not updated your alttext field in your images’ gallery… go to Gallery–>Manage Gallery–><your gallery>
<!-- Thumbnails -->
<?php foreach ($images as $image) : ?>
<div id="ngg-image-<?php echo $image->pid ?>" class="ngg-gallery-thumbnail-box">
<div class="ngg-gallery-thumbnail" >
<p>
<a href="<?php echo $image->alttext ?>" title="<?php echo $image->description ?>" <?php echo $image->thumbcode ?> >
<img title="<?php echo $image->description ?>" alt="<?php echo $image->alttext ?>" src="<?php echo $image->thumbnailURL ?>" <
?php echo $image->size ?> />
</a>
<a href="<?php echo $image->alttext ?>"><?php echo $image->description ?></a>
</p>
</div>
</div>
<?php endforeach; ?>
this is my version of the code… copy it exactly to your gallery.php (thumbnail portion) and update each image’s alttext field(one liner textbox) with the URL you want to redirect to and each image’s description field(multiple lines textbox) with text to appear when mouseover-ing the thumbnail.
~cheers~