You'd just need to change the photopost to where ever your gallery is..
include('./photopost/inc_features.php');
include('./photopost/inc_photopost.php');
To
include('./gallery/inc_features.php');
include('./gallery/inc_photopost.php');
if its located in
www.domain.com/gallery/
Some servers might need to full path to it, Meaning something like this might be needed, Check your host for your dir path
include('/www/htdocs/domain/gallery/inc_features.php');
include('/www/htdocs/domain/gallery/inc_photopost.php');
Mine needs the full path like above...
As for the link in the nav bar, you'll need to login to your Admincp for the forums then goto the style & templates section and find the Navigation / breadcrumb templates. Then open the navbar template and find :
Code:
Content visible to verified customers only.
And add :
Code:
Content visible to verified customers only.
Changing
www.domain.com with your domain name..