Have a problem I am hoping to solve with The Gimp. We have one of those
"Schoolhouse Frames" where you can put a picture 1.5 inches by 3 inches
from grade 1 to 12 in it. Well, when we ordered photos this year - we
forgot all about it.

Is there a way to use The Gimp to make multiple images of this photo
onto one file, so that if I order a 4x6 or 8x10 print, I will get a
certain number of small pictures that will be the correct size that I need?