[Plugin: NextGEN Gallery] Slideshow Captions

I would like to add slideshow picture captions. Not gallery captions and not a static caption for an image.
I tried to add this:
$out .= "\n". '<div class="caption">' . $picture->description . '</div>';
to the function nggShow_JS_Slideshow but it places it inside the wrapping div with the images and gets scrolled through like every other image. Thus having no caption to display since there is no image to display with. The div will show up but like this
<div class=?"caption">?</div>

Any ideas on how to accomplish this?
Here is the website:

https://www.ads-software.com/extend/plugins/nextgen-gallery/