The firmware you mentioned is for 4550 not for 4570 ...
For the record, the equivalent MadDog <-> NEC model numbers are:
MAD DOG MD-16X3DVD9-8XB = NEC 4570
MAD DOG MD-16X3DVD9-8X = NEC 4550
MAD DOG MD-16X2DVD9-8X = NEC 3550
You can use BinFlash to write either the MadDog/NEC .exe files directly or to write .bin files.
If you want to go back to NEC1.08 afterwards, then you can use BinFlash again just as easily.