I lifted this idea from Creative Jamie's rolodex sketch organiser (http://www.scrapbook.com/galleries/192167/view/1998251.html)
I didn't have a rolodex and I've been looking for a use for this box (from Robeez Treaders- Hung on to it since way back when DD2 was a baby!). I removed the front cover, but decided to leave the ribbon on it (the ribbon was used to hang it on the display rack at the store). I made dividers by just covering the regular index cards with CS and pp and used punches to make the tabs. I print pagemaps sketches up on 4X6 index cards and put the example photo on the reverse side for inspiration.