Open your picture (or make a copy of the original) in photoshop. Go to the image menu and touch adjust then click on desaturate (you've just made the photo B & W). Now got to the Image menu and click on Variations. Click yellow once, and then click red once. You now have a sepia tone photo.

If it turns out its a Little "too much" color for you, go to the image menu and touch adjust again and then click HUE SATURATION. Now move the saturation bar to the left until you get the hue of Sepia you want. Sometimes you may need to adjust the brightness/contrast of the photo after this. Click on the image menu one more time can click the brightness contrast. I usually just add a little contrast, but play around with it, see what you like.