I would forget about warping the door. That is not going to work. I would take the frame out, and if you can't get the whole 3/4" out of one side of the wall maybe you could get 3/8" out of both: sort of even it out. It's amazing what you can do with a sledge hammer and a block of wood to...
You don't say what the ceiling height (to joists) is now. Looking at that ceiling, all the duct work, pipes strapped to joists, etc, I wonder if it wouldn't be better off with a dropped ceiling. with a dry wall ceiling if something goes wrong it's a mess to get to it. With a dropped ceiling...
I live in an A Frame too so I know what you are talking about. Insulating the roof before the roofing goes on is "the best way" but also the most expensive. I didn't do it when I built my house 40 years ago (didn't know to do it and didn't have the money either). I wish I had, but then I live...
Model #PFS22MBSBBB Purchased 8/1/05. The compressor cooling fan stopped working and the fridge started to overheat. This happened on the friday night before Easter. We took the back panel off, set a small fan back there, the freezer temp went down, and the fridge worked fine all weekend...