there is no inc_photofeature.php file
There is a inc_features.php file but there is nothing about any ppheaders things so I think you may be using the wrong hack or mod.
Again like I said you had the Pro program installed right it looked like.
You just need to setup a navbar link in your navbar template and install a photo block. Those as far as Pro is concerned are hack for vb
Basically all your doing here is using that xml file to upload to your plugins in vb
to add a photo block. If your using the right info and paths etc and place the $photopostfeature line in the forumhome template a photo block will appear.
If you continue to have issues you can purchase installation service. All this is really not too difficult.