K.D.
I have no advice on the biting, but the screeching was a problem in our household. I have a verystrong willed two year old boy. he is a delight, but always has his own agenda. All kids are different, but we had one disipline that worked well for us. When he would start screaming, we would take him to a quiet corner and tell him to "pull it together" in a very calm voice. His response was to take his widespread arms and pull his fists together. It made him stop and think about the right action long enough that it became very effective. We still use it at times. People around us also thought it was cute, so it diffused some embarassing public scenes. Of course, the best behavior was always when my son was well rested and fed routinely. Hope this helps and good luck. It gets easier at two:).