Nevermind about the .htaccess file; I figured that out via this thread: http://www.zenphoto.org/support/topic.php?id=89
But I still can't get the system to work. /admin doesn't work by itself; it needs the .php suffix added. That's no biggie, but then when I attempt to upload a .zip at /admin.php?page=upload, after clicking "Upload," /admin.php?action=upload loads a blank page. The folder I specified is created in the albums directory, but it is empty. If I reload /admin.php?action=upload, I return to /admin.php?page=upload, which then includes this message: "Something went wrong ... You must upload at least one file."
HELP!