Hi
It's very easy, just follow the wiring diagram and don't use solder, just touch the boot pin on the correct point, as you can hold the boot pin the because it only takes 20 seconds to read the EEPROM.
The most difficult part is opening the ECU, for which you should use a hot air gun to soften the glue that bonds both halves of the ECU together.
It's actually a very fast process, i can send you a video if you send me your email address or whatsapp.
Thanks