BMW E65 745i 2002 DME Swap

BMW 745 E65 2002

Hi.
I have the above car in with a non start which I have traced to a faulty DME. The customer does not want the expense of a brand new one so is asking if he can supply a used unit along with a CAS and key from a donor vehicle.

Can this be done and will any issues arise with coding and communication from other ECU's due to VIN mismatch or what would need to be done for it to work correctly?

Thanks.
Amr2012