Cat's can be set up different ways, so saying that you want it to operate like a Cat is meaningless. How exactly do you want it to work? Yes, Detroit's can be set up in different ways too. Also both Detroit and Freightliner have been around a while, I'm not going to guess at what you have.
Call a dealer with your VIN and ask them if it can be programmed the way you want it to work.
cruise on not set. Jake on. Jake will activate when bake is applied or cruise is turned off. I want to be able to shift with Jake on and not going off. This sure beets turning on/off all the time especially in traffic.