I have done a couple of cheater quilts, and the one problem I did have with them was that they are not always printed squarely on the fabric. When you square up the design, the overall quilt is not square. So, there's a bit of diagonal pulling, steaming, and blocking that may have to be done. A suggestion for the border is, cut the border strip right down the middle (that gives you enough for 4 sides of a square quilt) and float it in the middle of a larger one color border, chosing a color that "frames" the quilt.
Dawn
In beautiful Northwest Montana