Step by step tutorials

So I bought my husband a Nikon D50 for Christmas. He's totally obsessed with the camera (and a great camera it is), and he is snapping pictures constantly. He's outfitted it with another lens, a speed flash, and a couple of two gig memory cards. He's all set until he transfers the images onto his Mac. For then, my friend, he's a fish sans water. He doesn't know squat about resizing an image for print, the web, or an email. He's heard of the word resolution but couldn't define it if his life depended on it.