audi a3 reprogramming. Is this file useful for me?

[Ismael2020]

Hello
I have several modified files but I don't know which one to use and if they are valid for my car. Can someone confirm if they are valid and which one should I use? I guess you have to compare the files, but I don't know how to do it.
Thank you.

AUDI A3 1.9TDI 100CV MOTOR: ATD. 2002
ECU Bosch 0281010892. 1037363548

[Tawe]

Modified file is not from, and is not for your car. So if you want tune, better to work on your original file and not use this.

[Ismael2020]

Modified file is not from, and is not for your car. So if you want tune, better to work on your original file and not use this.

Thank you very much for the recommendation.
The truth is, I don't know how to do it. Do you know if there is someone who can make me a stage 1. to my original file?

[Tawe]

Here is Stage1 for your car. Write me PM for password