Lots of questions. It would be easier to answer if you give some formatting to your text.

1- I tried that but the IAC driver isn't easy to find, so I didn't pursue this matter and started using earlier P59 with the driver installed from factory. You still need to flash a OS for IAC operation, a DBW one will not work.

2- If you need to read the BIN directly from PCM, yes. If you have another software/cable to read the PCM and save as .bin it's better. PSOP chips are

3- location depends on the PCM and flash chip, some have it in the flash some have it in another chip.

4- Yes, you can flash any P59 BIN to another P59 regardless of OS and VIN, doing this will clone the other PCM.

5- Not directly. The only way is flashing the changes and reading as BIN with other tools.