I did the same thing last year, I love the look! really makes the stainlesss grill and glovebox stand out. I made a paper template, laid it out over the leather to cut it out and sprayed with adhesive. You are right, its all one piece and you just cut out the openings after you have applied it! Actually this is one project you may want to involve the signifcant other, since the folds on the sides are like wrapping a christmas package and its a lot like scrapbooking (so she said) regardless, she is much better with an exacto knife and scissors than I am!
