
In all seriousness - great thread. Just have to practice alot. Like the trem picking that some guys helped me with here. Just keep trying to hit the note with out straining too hard and the throat will open up in new places over time.
Sining along with Bruce Dickinson is good because his register can be too high for us mortals most of the time. You'll sound terrible for a few weeks and then one day out the blue you'll start getting some of them on pitch. The same way fingers evolve with guitar practice.
IMPORTANT: practive an even wobble in the vibrato.