Open your program. Click on FILE, OPEN, and find your graphic which you wish to resize. Once you have it open, you should see something like the image below. Next, resize your image to no larger than 325 pixels either in height or width. Next you might want to brighten up your image just a bit.
Images tend to look a little darker when they are resized.
Click OK, and then you are ready to save your work. Once you've done that, you can import it into FrontPage of what ever software package you may be using. That's really all there is to resizing an image in PhotoShop. This tutorial is intended to get you started, not to make you an expert at this program. Size really does make a difference.