How difficult is it to sew a quilt or fabric wall hanging?

What you want to do is fairly simple, Youtube has absolutely hundreds of videos on quilting, and there should be instructions on the pack of fabric on how to put your pics on. The most important things are, measure twice, cut once, and keep your seams the same, at least the standard 1/4". About.com has a lot of quilting info, and so does the library. Also, if there's a quilt guild in your area, they'd probably be glad to help you.