Hello, I am beginning my first DCC wiring in an engine. It seems pretty straight forward, especially if I had a DCC system that operates additional functions beyond lighting, such as any of the Digitrax systems. But, I have an old MRC Command 2000 system that works perfectly fine, but does not support additional functions beyond directional lighting. Well, in my first project ever, I have decided to add a Beacon light that is a flashing yellow LED. I would like this light to be on any time the engine is in use, or if need be, have it be on any time it is on the track with power. Using the Digitrax decoder, it has a fourth function wire where this LED would normally be connected, however with my system, this fourth function is not supported. So, I am wondering how I should wire this beacon LED so that it functions with my out of date DCC system, or do I really need to spend around $500 for a new system? If I purchase a new DCC system it will be a Digitrax system with a hand held controller that is not tethered to the control box. Radio or infra system, as If I have to put out hundreds of dollars I may as well give myself some freedom of movement. Any suggestions or help, so I don't have to buy a new DCC system would be fantastic! Thank you.