Just a word to the wise... you'll probably be cutting on the lines of the pre-printed panel. But... sometimes the fabrics aren't printed exactly on the grain of the fabric, so the pieces could be slightly warped. You can probably get them into reasonable shape with moisture and an iron. But you'll want to inspect them and keep it in mind as you work with them.
It's a lovely panel, though, and you'll be sure to have a beautiful project in the end!