Ninja, the quickest and simplest program to use is Paint (the free basic graphics program that comes installed with your computer if you're running Microsoft). Just open the image you want to reduce, then under the "Image" menu item, select "Stretch/Skew". Then enter a percentage in the "Horizontal" and "Vertical" boxes. This will reduce the image by those percentages (keep both percentages the same so the image will be reduce proportionately). Make sure your safe the file as another name as to not overwrite the original in case you reduce too much or not enough.