For Matthew's room, I found some white frames with white mats at the DI for 1.50 a piece. They had some ugly flower pictures in them. They still had the price tags from Bed, Bath, and Beyond - $19.99, so I saved quite a bit.
I didn't take picture of the process of making the frames match his room, but I'll explain it to you. I used spray paint to paint the frames dark brown. I painted the edge of the mats with dark brown acrylic paint. I covered the fronts of the mats with scrapbook paper cut to fit, and I inked the edges of the mats and the pictures with destressing ink. I cut the pictures to fit the inside of the mats since I couldn't get the glue to release the old flower pictures.
I did take pictures of the hanging process. I have ruined more walls trying to hang pictures correctly. I found this technique on another blog and I love it.
You lay everything out on wrapping paper. Draw around your frames - make sure they are level. Tape the wrapping paper on the wall. Again, make sure you have the paper hung level. Pound in your nails. Pull the paper off, and hang your pictures. No mess, no extra holes in the walls, and every thing is right where you want it.