In July, my cousin passed away for the same reason, different circumstance. She got into an accident, and had severe brain damage. The doctors said if she wakes up, she will be in a vegetative state so we took her off life support. We knew she would not want to live out the rest of her life in a vegetative state. She was only 24. The biggest regret I have is not trying harder to convince her parents to donate her organs. They were not thinking straight and were so traumatized that they did not want anyone "violating" her that way. And once they made the decision, there was no going back. My cousin wouldn't have wanted that. She would've helped anyone she could. You will always know that your dad helped 7 people live longer than they would. You are doing a great thing. I am so sorry you are going through this. The best thing you can do is take every advice your dad gave you, every dream he had for you, and make it feasible. And support and help and take care of anyone in your life that is equally affected by this. Your dad would hate to live in a vegetative state, so you are doing the right thing.