Yeah, the program makes your pics smaller. You open the pic you want resized and you can specify what size you want it resized to and it will do it. The nice thing is that it doesn't save over your big pic, but renames it and saves the smaller pic so you have both sizes and don't lose the original file.
It's pretty user-friendly.
ETA - I don't know PhotoShop, but if you have Paint, you can resize that way. Open the file, go to Stretch/Skew and reduce both the horizontal and vertical by percentages til you get it the size you want. Then, just use the little dots (they can be hard to see) that are midway along the white and draw the sides of the pic in. Then, Save As... and make sure to save it as a .jpg