Sorry matt1g, I got confused.
With inFocus it uses two images for the fancy_images so to change the width and height you would have to do a couple of code edits as well as a couple of images as well (the frame and the zoom hover which is also used for the portfolio).
It is mainly for recreating a portfolio without having to create a post for each image. You can use it in a blog post with two columns or in a full width post with three columns.
As an alternative consider using the frame_left, frame_right, and frame_center shortcodes. You can resize them by typing them out manually like so,
<div style="text-align: center;"><span class="frame aligncenter"><img src="HOST URL/wp-content/themes/infocus/lib/scripts/thumb.php?src=IMAGE URL&w=120&h=120&zc=1&q=100"></span></div>
Make sure to change HOST URL and IMAGE URL with your respective URL's. If you want to open the image in a lightbox then surround it with this,
<a href = 'IMAGE URL' rel = 'prettyPhoto'></a>
Sorry for the inconvenience matt1g.