Well I figured out an easy way to support the roof so I can climb out on it. I screwed a piece of steel from the new roof support to the old roof.
I made three of them and they seem to do the job.
So I took down the cardboard and started to remove the stuff that is in the way so I can make a better template.
I still have all this to remove.
I think I know a change I can make to make the front flat so the windows will fit better.