How much of a pain would it be to change how the site is set up. I've decided to integrate with PHPBB instead of using the classifieds by itself. My site isn't live yet, I just didn't want to reinstall the entire thing.
You would need to edit your config file and enter the phpbb database info and then in the mysql settings table of photopost edit settings 41-83-171-172-173 with the proper integration type forum prefix and cookie settings.
Otherwise easiest thing is to run through install again.