Thanks for your help Fred.
My customer is looking to have the entire length of the roll printed in one shot. All 40 feet, not inches. Turning the roll sideways and mounting it on a wall, he wants 3 or 4 vertical rows of images on the 13" high canvas that extends the whole way through the roll. All the images are horizontal and should be printed one after the other (meaning they would go through the printer in a vertical orientation). Though I have never done it, I know Qimage can extend beyond the 40 inch limit of the printer. This is what he is looking for: