I am installing an ERR Cruise Commander M in an Atlas O SD-35. It has a 07 version of the R2LC radio reciever. As I understand it, the 07 version will not support the AUX1 + 8 command for feature code set up. This command is for smoke unit operation. As this particular locomotive does not have smoke, can I use code 6 (cab/marker lights) instead and keep the original 07 version or do I need to upgrade to the 08 version?
Tom