Kind of, it isnt possible with your run of the mill chips but it is possible but i'm not sure 100% how its done, i had to retrofit a PFC D-jetro to a imported car from japan (GTR) with remaped ecu running map. I tried various ways to pull the base image off it but failed. It would have been quite nice to use the modified address information for other Nissan ecu's.
It is still a pet project of mine atm for SR20.