fwiw, and for anyone intersted.
I have sucesfully used this update on my Z120.
I started with a Z120 with the CNSD-210FM/UC patch (>130). First, I ran the "RenewalIFLib-AUTO-REPLACER v1.1", did a reboot, then put in the SD card with the CNSD-310FM/UC update using the "CARDINFO from CNSD-210FM" file in place of the included in teh upgrade rar. Eveything worked flawlessly.
Thanks to all you brilliant minds that made this all possible.