upload both files. if they are both 1mb or both 512kb they will cross flash. imo your best option is to cross flash it to the usdm b5 s4 auto / tip    8D0907551L file. it shares the same def as the manual 8D0907551M b5 s4 file. also here in the usa the b5 chassis never got immo so when you flash it to an immo on ecu it disables immo in flash. 99.9% of the s4 wiki applies directly to the 8D0907551M file and thats 1:1 calibration addresses of the auto 8D0907551L if you choose to use it. if you need help feel free to pm me

I was able to flash 8D0907551L but the behavior seems to be the same.
I've sent you a PM Marty. Thanks for the support.

I have an entire car (2002 Tip Allroad) . And it was working (I drove the car for a few meters more than once with no issues)
I can't start the car now to double check because I've already removed substancial parts from it.

Maybe I cooked the ECU removing the immo?

VAG shows a rebuilt item by adding an X to the end of the part number.

Ok guys , think I've made it
Found that 8D0907551G shares the same definition ( http://nefariousmotorsports.com/forum/index.php?topic=9672.0title= ) as 4B0907551S .
As such used that definition with the original 4B0907551S Image (In the DX ECU) and apparently was able to raise the Idle to 1500 rpm for testing purposes and code out the SAI .
I've also defined max speed to 120km/h and tommorow will go for a ride to see if all defs are really reliable .

Thanks to everyone that tried to help.

Use VMAXNB for speed limit.
VAVMX is unused "dummy" parameter if car is without active suspension level control.