Tim, from having seen many knee injuries and experiencing several myself, I can tell you something about your knee. Generally, when your kneecap slides from side to side, you are lacking strong lower quadricep muscles...those are the muscles that stabilize your kneecap. You need to ask your doctor about which lower leg exercises you can perform, and begin doing them immediately. About the pain meds, those meds are NO joke. I have dealt with many a teenager that has gotten addicted to oxycotin. Tim, to be honest, with your weight as high as it is, the problem you are having with you knee is just the tip of the iceberg in terms of thejoint/health problems you should expect to encounter with increasing frequency as you age. Why am I telling you this? Because you have always been honest with us and you seem like a good guy who just wants to hunt and enjoy life...BEST of luck to you my friend.

Brett