Hi, Jim
No, Win 2000, XP or Vista on1ly.
With 8 wire stepper motors, You can connect them in "series" 1/2 Amp rating of motor or "parallel" full amp rating of motor.
Series would be A, "A_C_", C and B "B_D_" D
Parallel would be "A C_" "A_C" and "B D_" , "B_ D"
No, Your stepper Board should have a "current" adjust on it, It should limit the volt's/Amp's to your steppers.
Adjust it to the your 2 to 4 volts, Measure the volt's across one of the stepper windings, The stepper's should be Hot to the touch ( be able to hold them in your hand for a little-bit before the "Ouch/Whoo" set's in.
Hope this Helps, Chip