The pp_headers entry is in one of the instructions in that 32 page installation thread that is referenced. The link you just posted referes to information to make changes to the index.php file that is no longer applicable (or so I gather from later posts). So while all the information is there on how to install this, there are also a lot of false leads, dead ends and mis-directions that have to be weeded out. I've probably gone down one of those paths that no longer apply to the current version of PhotoPost and vBulletin and haven't found my way out yet.
I guess the part that I'm hitting right now is the navbar and photo block. I'm assuming the navbar is the $photopostfeature entry and the photo block should be the $photopostcats entry. If that's the case, then I don't know why at least the frame work isn't showing up on my forum home page unless the path in the plug-in is wrong and I've done everything to putting in full paths based on doing a PWD in my gallery folder to taking it off of the PHP Info file to going into my control panel on my hosting site and going into the file control area and clicking on inc_features.php and seeing where my hosting site says it is.
Yes, it should work and no, it isn't that difficult. But then difficult is relative to what you know and how much you know about the program. I'm sure there are things I do that I think are very simple that just wouldn't make sense to others. Yes, I could pay for the installation service, but then there is no gurentee that that would work either and that would be more money down the drain. This is one reason why I try to only use programs that have a demo period so I can make sure they work for me in my environment.
It looks like you have helped me as much as you can, Chuck. If I have any questions that haven't already been answered dozens of times in the different threads, I'll ask about it. If I ever find out whatever it is I'm doing wrong, no matter how stupid, I'll post it so maybe it will help someone else. Thanks for trying to help, Chuck. I know what it's like trying to support something and help people that seem to have the same problems and questions time after time. And I know what it's like to see something plain as day and have someone else just not understand what I'm saying. Been there, done that and wore out the tee-shirt.