X360USB PRO Change 16d4S slim

Hi, i have a problem.

I have a xbox slim with broken 1071. I retrieved the key via rgh i have only the key!

I have another dvd reader that is 0401, I saved all, dummy, inquiry, identify, key.

Now I want to put the firmware 1071, with the key in 0401 as I do?

thank you so much