IsBoxer - revese step on keymap

So I read that step adjustment actions do not evoke the actions in the selected step. Is there a reverse sequence for the keymap that will evoke the actions?


What I'm doing:

I have a menu that shows me my current trap selection on my hunters. I want to be able to ctrl + mousewheelUp to ascend through the list and ctrl + mousewheelDown to descend through the list. When I do that the menu icon changes, popup text tells me which trap is selected and that's the trap the hunters load and fire when I press ctrl + T.

The only problem is I can't get the step adjustment to do this. Is there a way?

I don't have input but I am certainly watching this thread. Step adjustment actions are something I would like to know more about.