I have a set of these and was thinking of trying them with cotton yarn only to realize that the instructions had been misplaced. I finally did a search and this is the only helpful result that I found.
http://www.hankeringforyarn.com/tuto...-weave-loom-1/
Just thought I'd share in case anyone else might be interested. It has very clear photos of how to wrap the yarn and weave the rest.