Thanks everyone! In Picasa2, I did this: I starred 2 shots and created a folder. Then you hit in the tabs in the top left-hand corner CREATE (between Picture & Tools) => PICTURE COLLAGE => MULTI-EXPOSURE (there are other options) => CHOOSE or USE CURRENT FOLDER => CREATE. The 2 shots are then overlayed and you can crop some more! I would SAVE AS something, because once it was done, mine went into some other folder--had to find it-haven't figured out the technical part of it yet. Good luck!