If I understand correctly you don't want to remove and throw away the ECU, rather to "chip" it using your own program?

That being the case the chip companies might have some of the info you are looking for on thier websites.

SpeedTuningUSA and RocketChip do the 606.962 and there may be others.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)