That should help with the wiring.
As for the stepper amps. http://www.vicious1.com/forums/topic/how-to-connect/#post-3461
It breaks down to your steppers are 2Amps at like 3Volts, we run them at 12volts so the amps is lower.
2ampsx3Volts=6watts the more important number is watts.
.5 amps x 2steppers = 1 amp needed from the driver.
Hope that makes sense, I hope I am correct with all this it seems to work out when I set the drivers so I assume I am doing something right.
Clear as mud?