Hi again.
I wrote to the guy who coded my G6 cluster, he mentions that the ECU revisions matters here. Not sure if you can use ECU's with different revisions, just if they are from the same engine? I have a BXE. About the "convenience" menu, I think you would need to fit a G6 BCM/CECM, currently wondering if I should do that to get the menu back. :) Along with it should come some other nice features!