well if you use blank cds you can always use the cases that the cd's come in, or just old cd cases that dont really matter anymore. Then use fabric paint or some other type of paint and write a phrase or something meaningfull and unique on them. Pictures ussaly slide in really well since they're meant to hold the cd sleeve cover thingy. Then prop it up like a tent and bam! look at that bad boy.
My room has countless numbers of these splattered around.
Side note: you might have to trim the pics, so if you dont want to this might not be the way to go