Is it feasible to write/use a CAX file to add DTC enablers for controllers that EFILive does not have DTC's mapped for?

Ive found all of the proper addresses for various DTC's in the .bin, I just would like to add them into EFILive so I can turn the DTC's on/off easily in EFILive vs doing it manually in hex.

Also...."generally speaking" are DTC's kept at the same addresses in a single controller throughout various operating systems? Or does each OS for a specific controller most likely have different addresses for the DTC's depending on OS? Im talking older Delphi-era stuff, not Bosch.

Thanks