You can make a new partition and write the ISO there.
Nix broke the streak, and even that was just a matter of following instructions in their wiki.
I have done my share setting up systems, I just don't have the patience I had when I was younger, put 2 hours into it. Gave up. There are new thing that I don't understand, need to learn that to understand. To much work. Just need to buy that usb stick