I am very impressed with your detailed "from the bottom" repair approach. I have purchased the door from Napa and am excited to give your tutorial a go!! I have been running "full heat" all winter and now that spring is on the doorstep would love to get this repaired. I had assumed the actuator had failed.... but after removing and testing it works as required. Therefore, I have to assume that the door itself is stuck/broken/dis-attached.
However the images from your posted on April 2008....have broken links on the forum today. As your images would be a Huge benefit...is there a way that the images can be reposted for my (everyone's) benefit?