I would highly suggest using a continuous piece. If using the multi piece flashing, you will have to monitor the seal more often then if it were one piece. Water always finds the path of least resistance.
I would contact the Specialty Steel Industry of North America, MRA (Metal Roofing Alliance) or The Mason Contractors Association of America (MCAA) for this answer.
this kit requires a hammer, roofing nails, drill, roof cement, tin snips, and masonry fasteners. The installation instructions are in the product description.