Good luck in using the many suggestions here and R.I.P. to your father
Slightly off topic but for those of you not interested in what happens to you after you pass, why not donate your body to a teaching hospital? I had mine set up with Chulalongkorn Hospital where they will use your body for their medical students, you can chose to send the ashes to someone or they will dispose of them after a small ceremony.
Do good for future generatuons and avoid all the hassle!