Vin

Hi This help is requested for a friend of mune who bought a Katrina flood car Bmw convertible . He got a entire wiring harness and started at the trunk . well he is to the nitty gritty . He bought a new key authenticator . programed to the righrt Vin. The last one to go is the main . The vin showing up is for the the one he bought from a auto wrecker in Georgia .He is a mechanic has the program to access just needs guidance .BMW wants $1400 . Its a project car for him for his wife . He would like to know which lines of code to rewrite to get the vins to match. Then the engine would start . He has a engine and transmission sitting to go in if necesary .Also from Georgia.