Good luck. I was going to an A.R.T. doc for several months with some Patella tracking problems. She helped out a TON, however I've got way to much scar tissue in my knee so i'm probably going to have io have it scoped anyway to remove the tissue.
If you've had this injury for years, chances are you've got a ton of built up scar tissue. However, check out ART and see how it works for you. Some people have complete succes stories from it. And remember two things. One, they're going to give you a list of stuff to do on your own such as different stretch's, movements, etc...If you do not do them, the ART WILL NOT WORK. Second, the ART is only as good as the doc doing it. Try to find one thats been doing it for a while.
good luck