Is there any difference in the ECU's with different part numbers or are they plug and play??? I have a few VR's, 2 x 95's and 1 x 96 and each have different faults and I'm just trying to get 1 running with bits from them. Each car has a different ECU part number and I want to put this in a car with a different part number, Can I do that??? Any help would be great.