The best way is to use printer fabric (you can buy it in packages at your fabric store) or make your own with Bubble Jet. If they're not digital photos already on your computer you'll have to scan them into the computer and just print them out on the fabric. Don't try the iron-on photo transfers. They're hard to get a good transfer and won't stand up well to washing or the manipulating through your sewing machine while you're assembling the quilt. Trust me, I tried it years ago when I didn't know what I was doing.