Hi Star,
My Dad has NSCLC, but I think what your looking for is advice in general. I think as long as your Dad understands the seriousness of this all, and comprehends everything explained to him, he will make the right choice for him. Make his doctors explain, and if hes not getting it.. have them explain again...and again. In the end you just have to support him, whatever his choice may be. Keep your dad infomed of what may lie ahead, and he will make his choice. The best thing for you to do, i think, is be there for him when he needs you. I dont know much about SCLC, but remember that there is always hope. No doctor can tell you how long a person will live... if you need anything feel free to PM me... Im a good listener.
Jamie