i have a ch box ecu for my 1.8t and the car runs fine with eurodyne meastro. but i cant code the ecu from the current soft coding of 07500. its obviously coded as a vw front wheel drive 1.8t......i need it coded to a b5 a4 quattro and it wont let me do it....

could i need an immobilizer defeat to make it work.....the only digit that will change is the 5 to a 4 and back again thats it!

i have a registered vagcom and am hoping i dont need a different ecu. car runs great otherwise. any help would be awesome