I like this idea. After all you don't want others seeing pics of you or your girlfriend in compromising positions etc !

I would think something like a protected folder would have to be viewed in an Explorer type window that asks for a password to access. when viewing, icons clicked etc to open in the default associated programs. There's no point having pictures appear up in the photo viewer with a description saying "wife naked" and a locked icon, as that will still cause inquiring minds.

Or perhaps, when the picture/video/music/etc is opened from the protected folder, it shows only the protected files available in the player, or perhaps *all* of the files on the device are accessible.