Imagevue Powerpack is a 3rd party module which extends Imagevue with several features: Comments system, Vote system, News system, Footer and More++.
Many thanks to Artur for creating and maintaing this module!
Official page and download:
http://phillip.com.pl/powerpack/
Official Documentation:
https://www.photo.gallery/blog/imagevue-powerpack-guestbook/
Original forum thread:
viewtopic.php?f=47&t=6947