Hi i'm fairly new here and just catching up with all the regulars as they turn up on the front page. I've not read the whole lot but a page at the beginning and page at the end.
I feel the need to lecture you about your knees and running. I can't find any other way to warn you enough.
I've picked up on your knee pain. I think there should spread a rule amongst dieters not to start running until you a) get down close to your healthy weight range and then don't do too much til you get inside your healthy weight range and b) you've done some knee strengthening exercises.
Man, if you don't wait on this and you keep running, you will have to get knee replacements before 65 and they don't like doing that because they don't last indefinitely so it means you'd need it twice. So however you look at it, it ends up being a lot more pain.
Knees are delicate things. Ankles too i guess but i know less about them. People around here don't seem to be very conscious of this need for caution regarding knees. Walking will put enough strain on your knees when you are very overweight but running is plain dangerous.
Be patient with your weight loss and you will get there. Be impatient and you won't.