there are several ways to make hash, my personal favorite is dry ice hash, very easy, very effective. i use a 120 mesh piece of silk screen material, get all i can get out of my material, let the kief dry for about an hour, then run it through a 90 mesh.
that's what i press into hash. the stuff that's left in the 120, i either just leave as kief and dust it on bowls or into joints, or melt it into cocobutter.
i actually like to put on a pair of rubber gloves and spend about an hour kneading the ball of it, letting the heat from my hands and the kneading melt it together, then pressing it as hard as i can by hand. i've used presses, and it just doesn't come out as good, unless you have a big ass hydraulic one. you have to get that "melting" action going on, or it stays crumbly and kind of falls apart when you break the outer layer