Hi,
There are 2 steps to get the reflection...
Step 1.1 : Visit
http://cow.neondragon.net/stuff/reflection/ and download the reflecttion.js file
Step 1.2 : Upload this file in your template/your_template folder
Step 1.3: Add the following line in your header.html file before </head> tag.
<script type="text/javascript" src="{template_url}/reflection.js"></script>
Step 2: Open includes/functions.php file and find
$thumb = "<img src=\"".$file_src."\" border=\"".$config['image_border']."\"".$width_height." alt=\"".format_text($image_name, 2)."\" />";
Replace this with
$thumb = "<img src=\"".$file_src."\" border=\"".$config['image_border']."\"".$width_height." class=\"reflect rheight33 ropacity20\" alt=\"".format_text($image_name, 2)."\" />";
Thats it...
Let me know if this steps are not working....