I have a few questions for someone that knows Mac kind of well. I just seems like moving things around is harder than one would think.
Not sure how you got them but if you downloaded them they were auto put in the downloads folder, or you can change your Prefs like I did and all my downloads go into a folder on the desktop.I have been using PC like forever and Mac seems to hide jpg files because I can't find them in Finder. I is prolly ok just going to take some time I guess.
I trashed a bunch of photos in iPhoto and emptied trash and they still show up on my back ground and screen saver.