i just want to know , what technique you use in the intro of Cacophiny-Images ? it's like harmonic....but it sound a little bit different...can you explain the technique plz ?? & what you usually do in warming up ??

That intro was played by Jason. It was that technique where you pluck the harmonics with two fingers of your right hand. I believe it's the thumb and index finger.
Warming up, I just do anything at all. It doesn't matter in the slightest as long as you get your fingers moving.