I would also like to reaffirm what both other posters have said. Make sure that the rods that you use are proper fitting for the spring mechanism, and also make sure that you don't make any mistakes, because one mistake, and you will need a lot of medical treatment. It can be done the way it says in the first post, however, if it were my door, I would find a local door installer and ask him how much he would charge just to "unwind" the spring for you. I think it is worth the $10 - $25 that he will charge for 5 minutes of his expertise rather than seeing you getting injured because of your inexperience. Some will say that if you don't do it yourself, then how will you ever get experience. Some things we only get to do once in a lifetime, and it isn't worth the risk for the experience. When I was still active on the ambulance, I remember a fellow that tried to wind the spring to install the door, and something went terribly wrong. He had a broken nose and jaw from the tools flying out at him, and a broken arm and collar bone from falling off the ladder. My advise is to spend the few dollars and take the door down after the spring is released by someone that has the experience to do it safely.