Untested, but you would need to edit the if-block of code starting with the following in the PhotoPlog index.php file:
Code:
Content visible to registered users only.
Maybe something like the following will do:
Code:
Content visible to registered users only.
Though note that, as functions are run on a field, it is not optimal to do this. Large galleries would definitely not, not, not want to do this, as there is a full table scan.
Again untested, but you could try this instead if you are not worried about missing files with the same name:
Code:
Content visible to registered users only.
That should use an index but will miss files with the same name, catching only the first one for display.