The 'ECU info' is not the .bin file; the ECU info is literally what it sounds like, the information about that ECU (hardware # etc.). Since you're able to get that far though, you have been successful with connecting to your ECU through the Nefmoto software. This is good. After you are connected, click the tab 'KWP2000 Flashing', click 'Choose Memory Layout', select either 'AM29F800' or 'AM29F800BB' (I don't remember which is correct for the RS6, but there is no risk if you select the wrong memory layout). Click 'Full Read Flash' and save the .bin file when it is done. It should automatically disconnect when it's done reading and saving, but just make sure the dialog says 'disconnected' before unplugging the cable.
Use this .bin to set up your logging.
Edit:
I just re-read your post, and you already list exactly what I said. Just do that.