The basic process is pinning a scrap to a paper design, sewing the scrap onto the paper along a preprinted line, folding on the next line, trimming the seam, lining up the next scrap, and sewing again. That's it!
The instructions came from a free class on the Learning Fiber Arts Yahoo group.
I love this group! They (we, now I guess!) have a ton of ongoing FREE classes. Check it out!