Help for a newbie:
Greetings to all.
I just started my first steps in ECU reprogramming with KESS and KTAG machines, and there are several issues that I would like clarified.

1 If I have to change an ECU because it has been damaged, I read the donor one, but then in the new ECU, what file do I write to it?
I supposed to replace the damaged one, so won't that reading also be damaged?

2 I assume that when we are going to perform an IMMO OFF I have to do it with an external software, I cannot do it directly with KTAG, that is?

I read the EEPROM with KTAG, I perform the IMMO OFF with IMMO TOOL and then write that resulting file again in the ECU with KTAG.Right?

I hope you can answer my questions and learn from the best.