[HawgRyder]

If the skin is like any other that I have replaced...it's just a matter of drawing a straight line accross the door or using the new skin to do it...and cutting carefully so that the new piece will end up butt welded to the main upper part of the door.
The lower part of the skin is sort of a wrap around and crimped piece.
Because the wrap part is not welded...make sure you prime or paint protect the inside of the crimp...and the shell part it crimps to.
Use very low heat...stitch it (weld a 1/2 inch...leave an inch...do another 1/2")
Then go back and stitch the unwelded areas.
Should turn out fine if you are careful.
Bob