I don't see what it is not practical. Consider it another traffic source. These days you must get your traffic from as many places as possible.
Take your old 20 pic tgp gallery that you have submitted elsewere, divide it up into 4 tgp2 galleries of 5 pics each, while your at it put the large pic on html, with a banner on top and a text link below and hook that large pic staight to your sponsor and then submit it to
http://www.tgp2gallerypool.com.
What can be easier?
Set up your own tgp2 on that domain you don't know what to do with using links from
http://www.rotateher.com.
Don't forget to put lots of juicy text links and keywords for the spiders.