Find out if you have a board certified animal behavior veterinarian in your area. That would be your best bet for getting help with him.
What you have is a cur and they are not like other dogs. They are very intelligent and need allot of work and a real job to do. They are bred to hunt wild boar etc. Tough dogs.
You don't want to risk another dog life. You can get hurt, the dogs can be hurt, and most of all it will just make things so much worse,
If you can't find a boarded vet behavior vet then try to go on the vet behavior website and see if you can find some qualified help from there online.
Also try writing the problem into these people as they may have some suggestions.