Found forum input and user guide for Permissions. I'm giving it a try, although it looks like everything was already correct.

I've gotten much further (hope that's a small consolation for all the work I'm causing you--I'm learning!). I believe the install is now okay--I'm down to two warnings:

1.
php display errors [is enabled]
This setting may result in PHP error messages being displayed on WEB pages. These displays may contain sensitive information about your site.

I have searched web and forum and cannot find where to change this file to disable. Can you please help?

2.Perhaps there was a problem with the upload. You should check the following files...
The setup then shows a long list of files. In reading posts in the forum, it appears that this may because these files were reinstalled? I looked at the first one, index.php and found nothing obvious. I also ran across a post (several days ago) which said something about having a space before <?php at the top of the file.

I'm not changing anything until I get confirmation that I should.

Bottom line: with the exception of these two issues (and not having MySQL 5.5.0 available--my host has 5.1.x--it looks like I've gotten everything else fixed. BUT, when I click GO, I get:

The requested URL /zp-core/setup/index.php was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Now what? (And is the end anywhere in sight?)

As ever and always, thank you for your admirable patience. Amazing support!

#1: You need to do this server side via htaccess or PHP.

#2 Those are warnings if file time are different. This can happen either if you upload files an hour later than the rest of the package. This can be harmless but also a sign of a hacked file theoretically. ZP also warns about files within its core that should not be there.

MySQL 5.5 is not required, it is recommended.

[i]The requested URL /zp-core/setup/index.php was not found on this server.[/i]
Are the files there?

[i]Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.[/i]
Is that the full error message?

Thanks for the quick reply.

I'll work on #1. I'm not at all sure how to do this but I'll research it and hope for an answer.

And YES, that's the full error message. I checked and index.php file is installed and shows up in the site directory. It is current as of this morning.

Still working to disable PHP error display messages. Via FileZilla I have gone through the site looking for the php file which contains this option, and so far can't find it.

Being new at this it's likely I don't really know what to look for. (Are you chuckling? :>) I'm more than willing to do the work, but almost an hour later I'm getting nowhere.

Is the file I need located in the files I uploaded from Zenphoto, or is it something I need to contact Dreamhost to change? (There is, as far as I can tell, no place in the domain management section of Dreamhost that allows for access to changing php.)

IF (by the grace of the zenphoto crew) this is a file I uploaded from Zenphoto--please tell me what it's called and what I change (i.e.: got to index.php in the zp-core folder, find PHP display_error [enable] and change to disable.)

I hope you're not ready to give up on me yet...I know I'm taking a lot of time and energy but I want to be able to do this!

Thanks again.

#1 is something you change in your PHP.ini file.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

This is a server configuration issue, but not a serious one. That just says that the server's 404 processing is setup to use some file that is not present.

There are two possibilities with `The requested URL /zp-core/setup/index.php was not found on this server.`

One: the file permissions may prevent the file from being "found" by the browser request.

Two: at the point this happened the setup files may have been "protected" so the file did not actually exist. If you use the link `.../zp-core/setup.php` instead it will restore the files before executing them.

[i]#1 is something you change in your PHP.ini file.[/i]
Given the host allows access to the main server `php.ini`. Unless you have your own selfmanaged server not likely. Common are individual `php.ini` files per directory.

For instance, on my host I have to do tha via individual `.user.ini` files per directory (php 5.4) and/or via `htaccess` (php5.2/5.3).

So only the host can answer what you can do on your webspace.

Thanks for all of the above info.

I have a support ticket in with my webhost. I don't have my own server. There are no php files in my website directory (other than those in zenphoto), and a search for hidden files yields no further results. But your reply to #1 is very helpful. Thanks!

re #2. I reran the set up php with .../zp-core/setup.php
I also reset permission for zp-core/setup/index to 755. I get the exact same error message.

Does the setup program run? You seem to indicate that from the statement that you were getting warnings that come from setup. If it runs I have no clue as to why you would get the #2 message.

Yes, it appears that the setup program runs. It's only when I click on the "GO" button at the bottom of setup page that I get the #2 message.

I just tried it again: www.mydomain.com/inlaygallery/zp-core/setup.php and it ran. Clicking Go gives me #2 message. I went back through FileZilla and changed a permission in the zp-data and that change showed up as a warning (I've changed it back to the recommended 600 for the debug log. Clicked Go--get same message.

So, after clicking on "GO" does the next page of setup show up? The one where it says it is updating the database, etc?

If not then the main difference is that the link is done by a form posting.

No, after clicking GO it goes directly to the page with the #2 message.

I'm not sure what is meant by a form posting. Do I need to do something or is this another server issue? My webhost (Dreamhost) is very slow in responding--usually takes about 36 hours to get a reply, so I may not be able to get much done if it's something they need to fix.

This is the URL of the page I land on after clicking GO from the set up page:

http://www.bluelioninstruments.com/zp-core/setup/index.php?checked&update&mod_rewrite=ON

Yes, that is the URL that should work. Have you tried entering it directly?

Also try disabling the rewrite option of your server if it is set.

Unfortunately we are in "unknown" territory here. Such a URL should always work, so I have no idea why it would not.

Maybe also try the URL: `http://www.bluelioninstruments.com/zp-core/setup/index.php?checked` and see what happens.

One more thing. Where is Zenphoto installed on your site? Is it in the root or in a sub-folder?

Tried both links and get the same message (#2). Definitely a stumper, eh?

I looked at the manage domains page and don't see any rewrite option on my webhost site.

Should I just delete everything and start over fresh? What about using an installer like Installatron?

Zen photo is installed in the root folder. Directory is /bluelioninstruments.com/inlaygallery

In the directory, the top folder is /bluelioninstruments.com

Under that are folders with my website pages. One of those folders is inlaygallery and in that folder are the zenphoto files.

http://www.bluelioninstruments.com/zp-core/setup/index.php?checked indicates that Zenphoto is in the root of the domain.

It does not matter if that is a subfolder of the webspace if the domain is linked to that folder. That makes it "root" for that domain.

But it cannot be in the root of that domain as there is another website already. Then the above link would be wrong and probably should be http://www.bluelioninstruments.com/inlaygallery/zp-core/setup/index.php?checked
That shows a however broken setup file without styles.

So where is it supposed to be? You can have only one site in the root, either your (Supposedly static html) site or Zenphoto as the CMS.

I have gotten to the next page--sort of. I typed in http://www.bluelioninstruments.com/inlaygallery/zp-core/setup/index.php?checked several times; closed out the browser, opened it up again and it went to a page:

Zenphoto Setup upgrade

In bold, it says About to update tables...followed by Done with table update.
Migrating lib-auth data version => version 4.

Plugin setup: [followed by many many many files(?) starting with admin-approval auto_backup and ending with zpCaptcha.
Then the flags.

That's it. No indication of what to do next or where to go. But at least I've gotten this far with your help.