What are you trying to make? Little boxes?If so the image is all scrunched up.
Why not make it for A3/Legal if the image is being shrunken? It's not something I would do, not after making my own covers for EU DS cases for my GB, GBC, and GBA collection, but it's a cool idea that could be improved on .
Enthusiasm is good, but just stretching images into different shapes is just plain horrible. Sorry to be so blunt!
I made a UGC template a while back that did not distort the art, I'll try to find it.