I've tried to make a fresh install of zenphoto 1.0.6 it's located here:
http://poto.moosh.nu/moda/

I tried to go to /zen/setup.php but it keeps giving me a 403 Forbidden - but the folder is there.

My phpinfo() display is http://www.moosh.nu/am.php and my zp-config.php is below:

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Hello,
I have just had the same trouble. After trying some things I noticed that replacing the .htaccess-file with an empty file (or deleting it) could take you a step further. Installation worked, but unluckily, I still do not see my photos, but this may be another problem.
patrick

Thanks for the tip, patpan.

I am going to try the 1.0.7 out, if not I think I shall just have to go manual or choose another image gallery. Although finding one I like will be quite hard.

@jenny - The big question would be what does your htaccess file look like? you probably want to make sure it matches your root zenphoto path (generally by default /zenphoto)

Also, try following the tips here

Let us know if you're having additional trouble and we'll try to help further.