first check the picture size. if you can't using whatever software came with the camera, mak a directory on the c drive and label it PICTURE. copy the picture from wherever it ended up to the PICTURE directory.
righ click on the picture and open properties to see what size it is.
open your software that came with the camera and there should be direction for opening the picture and then making the picture smaller. then crop the picture itself cutting off all the excess empty space around the picture. save it and it should save back to the PICTURE directory. check the properties again and you can see if it is under 100 mg. if not repeat until you get there. there should also be an automatic repair to the picture to correct for contrast and focus and darkness.
play around with it until you can do it correctly.