Yes, I could reprogram the VIN to get the radio working but the mileage is encrypted.
I guess I'll just copy the program from my old cluster to copy it to the new one.
I somehow damaged the LCD screen and am looking for a replacement one
You could also try contacting Qmulus (that is his screen name). He is a member here and see if he can help you. He does work on the 986/996 gauge clusters and can reset the mileage and possibly fix your problems.
He actually does this stuff for a living (German vehicle electronics).