Since the spot beams were activated you can't get all the time zones across the nation like before. You CAN get the national east and west coast feeds, plus whatever overlapping locals you might be close to. The mvchannels script lets you do this.
Now, as to a step-by-step, I think you'll have to dig in and start learning. Most folks around here are very glad to help those that help themselves, but frown upon the "spoon feeding". This is a hobby, and like any other, takes some effort to become proficient at.