I don't know how I managed to miss your post. You have been given some really good advice. You need to go very slow with him but ignoring him is not going to help him to overcome his fear of humans.
First off, when you have contact with him you need to get down to his level. Don't sit too close to him but get down on the floor with a few REALLY good treats in a little ziplock baggy. If he cowers when you try to bring you hand toward him just stop and place your hand on the ground near him and calmly talk to him. Let him come for the treat building his trust. When he takes it give him lots of praise. You don't have to try to actually touch and pet him but let him take the treat and gently talk to him. You will see after a while you will build his trust in you. NEVER RAISE YOUR VOICE to him no matter what he does. Do this in very short sprints of just a few minutes at a time. I will guarantee that he will start to come closer and closer and eventually understand that you are good.
Keep treats with you at all times, when he does something good give treats. If you are giving a lot of treats all you need to do is cut back on his food at meal time. If you can build his trust while on the ground with him
I would also keep a leash on him all the times, letting him drag it behind him. Try to pick up the end and see what he does. If he becomes fearful get to his level and give a treat and praise again. If you want him to walk on the leash start in the house and drop treats as you go and praise, praise, praise! This way you can control what he is doing without the fear of being bit and he will get use to having a leash on him. Also, if you gently lead him out of his crate or away from his bed he will come much easier. Once again treats and praise!!!!
Although he needs to be socialized this is not the time for the dog park. You need to allow him to build trust in you and then start to take him out to explore his world.
I have a sling carrier that I used for Bogey, my little wild man and it really works great! Just make sure that if you use it that you also use a harness and clip in into the bag. Bogey really likes the sling because it allows him to feel like I am holding him. The one that I have is from Amazon and is call an Outward Hound Sling Carrier. My little man likes it so much he is now going to get an upgrade to something more stylish!
There is a really good book called Let the Dog Decide. It works on the premise that if the dog thinks he is making the decisions you will have a better outcome than if you force him. I bought mine on Amazon for about $10 and it was the best $10 I have ever spent. With these poor little guy, lots of positive reinforcement is needed for the transition into your home. It is always difficult when mill dogs go to homes without any rehabilitation. They have been so traumatized that no matter how much love you try to give they just don't understand since it is so foreign to them.