His threads are all linked. But I believe they will help you. Let me know if I can do anything else. If you have any input for me from a man's point of view drop by my thread on Midlife Crisis site.
Take care
Everything happens for a reason, maybe Dad needs to find that it isn't better out there, he needs to realize how good he had it here. Maybe he will find God and that is the most important thing when he finds Him he will know he is supposed to come home.