No no I have no intentions of writing a loader.
I just was curious to which loader was used by Galletto and Byteshooter for example, and how they do the password transaction.
Anyways, a log is made (indeed in silent mode) and enough is clear now about this subject.
Galletto and Byteshooter may change baudrate due to communication to ECU. In this case you can't make log easy. To unlock Tricore they send 16 bytes password to ECU.