[Plugin: nextGen Gallery] display ‘un’linked image

Is there any way with nextgen gallery to display one RANDOM photo at a particular size and have it NOT linked to anything?
you can see an example of what I’m trying to do here:
https://www.delnorteoutfitters.com/albums

trying to make the large image not linked and not an oversized thumbnail.
the way it is working now is like this:

<?php
$number_of_pic = '1';
$Width = '450';
$Height = '300';
if (function_exists("nggDisplayRandomImages"))
{ nggDisplayRandomImages($number_of_pic,$Width,$Height); }
?>