I should (yet again) point out that pinch harmonics and artificial harmonics are not the same thing. Im getting tired of saying it.
Anyway, back to the subject. Andrew, I know I've tried explaining this to you before over the forums, but thats not the best way to explain guitar technique.
If you have any more troubles, I'll send you some real basic, simple explanations over e mail. That would be better than trying to explain this over the web.