Congrats on the addition, and let the addiction begin for you. I have to say though, you might want to spring for The More COmplete Chondro, by Greg Maxwell. It has answers to many many questions, and will be constant refrence source when little questions may arise.
I am not going to act like I know everything about GTP's, but I have learned a thing or two from my five that range in age from neos to adults. This was the first snake species I ever kept and if you just figure out a system that works for you then everything will click on all cylinders. By system I mean a routine; To be honest with you, I have no idea what my humidity is, and I havent known for a year (I bought a humidity gauge when i got my first gtp). All I do is make sure every morning I spray all of their cages heavily, and that five minutes later the cage glass or tub is completely fogged up. Thats it....I have read on other forums that some people will wet a towel and use it as their substrate and it works well too. The key in my eyes is to make sure you have enough venilation to where the cage will be dry by night. The only exception to this is in the evening I will spray down a cage of a snake coming to the end of their shed cycle. So that is the long winded approach "I" use. Others may do things differently, but like I said the key is finding out what works for your snakes and know how your cages will exchange air.
As far as "taming". Well no snake is tame, some are tolerable of being held, and others aren't. True some may grow out of their bitey younger years. But I have a Aru type male that grew into being a real wild man, and he christened me with my first snake bite. The key to not getting bit will be to interact with your snake during the daytime, have removeable perches (you can cradle the snake in your hand as opposed to trying to pull it off its perch), and dont force anything...if it wants to leave its perch it will. It looks like you have a baby Biak type so it may be a less than happy camper for its whole life, not a lot you can do to change that.
I wish you the best with your little one, and I hope you enjoy the addiction as much as almost everyone who gets into these wonderful snakes. Two tidbits you might want to consider: get some plastic perches **coat hangers or 1/2 inch pvc for a neo that size, because those wood dowels are going to start getting moldy and harbor some nastiness you wouldn't want your little one perching on. Also, (If you haven't done this already) you might want to get some fecals on that little one to make sure it doesnt have any internal parasites, which could ruin your first experience with green trees even if you are doing everything absolutely right. GOOD LUCK
