I am making progress! I managed to remove the felt tracks and the windows in the aluminum frames according to the instructions. The hard part is the fixed window; I would not remove it unless it is damaged. In my case the fixed laminated 1/4" glass was hard to remove because it is siliconed on the top and side, then supported in place by pressing it into the silicone and putting plastic shims underneath. After two hours, I realized that trying to cut the window out was impossible; I smashed it out, then cleaned the gutters.
Removing all the sliding tracks is becoming fairly easy: I tried numerous approaches, but the one that worked best within 1/2 minute was using a micro steam cleaner (steam storm 3000) that just made it easy. When I removed everything, the steam cleaner allowed me to steam clean all the aluminum tracks and get them ready for sanding, acid-wash and painting. I have a glass guy to reproduce the glass and tracks, tomorrow I look for the acid and paint.
Once you see the aluminum frame, you will agree that this engineer worked hard to solve a problem. There should be no problem with wood rotting or seeping inside if the large weeping holes are kept clear.
Stay tuned; hopefully someone else will learn from my trials: I am sixty-seven and this is the first time in twenty-five years these windows are being repaired. What are the odds of me having to do this again?