Brother diagnosed with Stage 4 non-small cell lung cancer

Hello,
I am so devastated right now and I've been reading so much trying to understand the whole concept of this disease and can not believe how serious it is. He was feeling fine until one day he had back pain. Went to back doctor and they recommended an MRI where they saw a mass. He had a tumor and when they got done with all his MRI's and Cat Scans they diagnosed him with Stage 4 small celled Lung Cancer that metastasized with a tumor on the spine and another on the lung and the rib. He is only 41. He is in the picture with me. We live in Las Vegas, but he went to NY for treatment. After seeing an Onychologist here where he was diagnosed, we decided that he would be better off having treatment in NY because that is where most of my family is. I cannot stop crying. We are very close.
I am very confused about these Chemo treatments. All I keep reading is how they kill you instead of the cancer. I am wondering if anyone did any kind of alternative treatments. I read about the Gerson Therapy and another type of Treatment in Reno using salicinium from a Dr. Forsyth. Has anyone heard of this? The doctor in LV said that he would use Zometa (for his bones once a month), Carbo/Tazol/Avastia and RT to spine. How sick will he get from these treatments? I am so confused and nervous for him. His appt. with the Dr. in NY will be tomorrow and the doctor in LV said that he will be surprised if he uses something different. Another thing, when they say it is not curable, but treatable what does that mean?
I read a lot of your post and I am amazed how all of you are so supportive of each other. Your stregnth and inspiration make me feel better. He is young, he is strong and has a lot of faith in God.