I have been using that exact stepper motor, you pulled it from a printer right? the wire pulses go in order from one end of the line of wires to the other, the direction of course depends on which direction you want to turn, and the middle is the center lead. I set mine up with a ULN2803 darlington array IC, but there are lots of darlington arrays that will do. Its simple wiring cause all the inputs on most darlington arrays are straight across from the ports they controll, and the power for the chip is the two pins at the end farthest from the notch. All you have to do is power it accordingly, plug the outputs to your motor, the corresponding inputs to your MCU or parallel port, and pulse the inputs in order.