I am trying to install windows through bootcamp on a 2,1 mac pro and it just won't let me. I can't even get pass the download drivers part. The button to continue is shaded out. Now I also have a 5,1 mac pro. Is it possible to make the windows drive on it, use its drivers, then install it to the 2,1? For your reference 2,1 is using el capitan and 5,1 is using sierra. Both are using same video card, sapphire 7950.