Indeed, full install, it installs in a new folder and you can run Poser 5 and Poser 8 side by side. I've got Poser 5, 6, 8, 7Pro and 2010 Pro installed on my system. I only use Poser 8 myself, the others are there to test content I create with.

Artwork and 3DToons items, create the perfect place for you toon and other figures!

http://www.renderosity.com/mod/bcs/index.php?vendor=23722

Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk