You know, you could also use
Pixlr. Instead of transparent backgrounds, you can use the Lasso Tool to cut something out of one picture and put it into another, or, if the portion of the picture is too big to cut out neatly with the Lasso Tool, you can use the Select Tool (in Free Form Mode) and select parts of the picture that aren't part of the wanted portion and delete them, and eventually you'll be left with only the wanted portion of the picture (if you need to do this for several days, then just do a Save As). Then just put the whole thing into the other picture, and voila! You've put one picture/one portion of a picture into another picture without the use of transparent backgrounds! (I'm pretty sure transparent backgrounds can't do portions of the picture)
Hello.