Do have to ability to post a video of your form ?
it sound a little like your squat form is similar to a powerlifting squat
http://www.exrx.net/WeightExercises/...s/BBSquat.html
which is better for your knees and puts more emphasis on the glutes and less on the quads. It is important to have good hip and ankle flexibility.
having a wider foot position will take more of the preasure off your knees
Squat analysis with modifications for weak joints
http://www.exrx.net/Kinesiology/Squats.html
Goodmornings are an exercise for the Erector Spinae (lower back)
http://www.exrx.net/WeightExercises/...odMorning.html