I think, i cant help you at your car, but if you have any information about that ecu post it, and maybe its easier to find someone who can help you.
Pictures or informations about the processor, mappacks, locations, .. Only some input from me, but as sayd on this special ECU i cant help you, even with the informations above.
Thank you for answer. I post here a WinOLS mappack I have.
Processor are Intel SAB80C517.