I've always understood that the privacy settings for photos in an album are set on the album not on the individual photo (as is covered here). However, I notice that I have one folder (created by Bitstrips) which has the album privacy setting as "You can change the audience for each photo in this album" and sure enough I am able to set difference settings for the people who can see each photo in that album.
My question is, how do I get other photo albums like this?