Since you have failed to read Starr's article, I shall provide a description. We teach the power snatch the same way we teach the clean, sometimes concurrently in a seminar if somebody presents with your problems. Like the power clean, it is a jump with the bar in the hands that terminates in its rack position. The differences in the two lie almost entirely in the rack position -- over the head at arms length as opposed to on the shoulders. The wide grip is designed to facilitate a shorter bar path to lockout. Take a grip that places the bar in your lap, between your pubis and your hip pointers, when you are standing erect with your chest up and arms straight. We teach both movements from the top, and then tack the deadlift onto the actual snatch or clean.
Now, get the bar up over your head with your elbows straight and the palms of your hands facing the ceiling. The bar will be in balance here when it is directly over the shoulder joint. In this position, shrug up with your traps like you are not through pushing the bar up. This is the rack position for the snatch. Lower the bar from this position by unlocking the wrists first, then the elbows, and dropping the bar down your chest as close to it as you can get. Drop it and catch it, don't slow it down. This is the bar path it will make on the way up, and now you have practiced it on the way down. It must stay close.
From the hang position (same terminology used in BBT for the power clean) unlock to the jumping position, in mid-thigh. Elbows are straight, in internal rotation, eyes forward and slightly down, feet in a jumping stance. Internal rotation reminds you to keep your elbows straight. From this position, jump up in the air as high as you can WITH STRAIGHT ELBOWS. Just let the bar follow the jump straight up. You should do this by sliding the bar up your thighs to the same position in your lap it touched in the hang position, and it will leave your body from there as it flies up. After you have determined that the snatch is in fact a jump with the bar in your hands WITH STRAIGHT ELBOWS, jump and catch the bar in the rack position. The elbows bend AFTER THE JUMP, as the bar passes out of the ROM where the elbows can stay straight, and you will see that you really lead this movement with your wrists. Wrists lead the bar up, and they are the LAST thing that extends. This must not be a pressing movement. Do this a few times, and then incorporate the "drop" under the bar as it passes close to your chest and then your face. Watch a few snatches to see what this looks like.