It takes about an hour and a half to do one side... about three hours total (for the bi-hawk, anyway). Any other effects, like the leopard print on the sides, is another matter entirely. That usually takes about a day of prep. It might go faster if I had help, but I do it all myself.
To put it up: 1] Using a comb to hold hair up, spray Rave (theres a spray called Rave, just to make sure something doesn't get lost in translation here) on one side (lets say the right). 2] Move onto next section with comb, spray on same side as in  (the right) make sure to put the sections where the hair wants to be, not where you want it to be. By this point there should be a gap about 3 inches wide between sections  and  3] Since you sprayed the Rave on the same side in the first 2 steps, graze your hair with the comb and the non sprayed side (don't stab it through, that'll just make lots of little gaps) into the gap from both sides, and spray (on the left, this time). Repeat down head. 4] When you get your hair how you like it, (still use a comb to hold your hair in place so the dryer doesnt blow it around) go over it with got2b freeze spray. The reason this works is because Rave is more watered-down then got2b, so when you spray it, it's only good enough to coat one side, leaving the other soft enough for a comb. It also adds thickness (why, I can't explain) so the hair at the top of your hawk isn't transparent. I'm not sure if you have either brand in europe, Rave or Got2b, but Rave is a mildly weak spray, and Got2b is a god-tier strong one. I've heard of people using spray-on clothing starch to spike their hair, have you ever tried that?
Its also important to keep it trimmed every few months (the dead ends will cause your hair to look messy and thin) and colored (the lighter your hair is, the more light goes thru, causing it to look thin). Also, use a leave in conditioner after you wash your hawk out, and put vegitable oil in your hair once every other month.
Hey dude! Thanks for the add. I use ordinary hair spray (pump, not aerosol) - the really stiff kind. The trick to me is to use a light coat on really dry hair and use a hair dryer like mad. If my hair gets too heavy with product then it topples.