I'm having some trouble right off the bat setting Zenphoto up. Here's my set up page:
http://www.stewartsorganicfarm.com//zenphoto/zp-core/setup.php

It seems to be permission errors but not knowing a lot about such things I'm not even sure where to start. Could anyone offer some suggestions please?

Thanks

You have to set up permissions so that PHP scripts can read and write their files.

Exactly what works depends on the server. For instance permissions of 0777 might work (but are pretty unsecure). However, some servers will not allow script execution from folders with such loose permissions.

You can try 0755 (folders) and 0644 (files) and see how that goes. If not, you may need to consult your service provider.

I think I have the same problem. When I chmod 777 those folders (as asked) I then get a message saying:
Setup could not change the folder permissions from loose (0777) to strict (0755). You will have to set the permissions manually. See the Troubleshooting guide for details on Zenphoto permissions requirements.
Then, when I go to 0755, I'm back at square one, getting the same message that I have to chmod 777 again.

I think this is stupid anyway. A PHP-script shouldn't be messing with file permissions in the first place.

No, Zenphoto does this to "secure" its running (this is done for your convenience). Maybe you have to try "relaxed". Sadly some shared host do require the unsecure 0777 and do not work with strict or strict+.