I've learned most of what I know via reverse-engineering stuff that works in Helios.
As for bindings, it's easy to see what's bound to a switch. Just select the switch itself, then look at the BINDINGS > OUTPUT > BINDINGS window for switches that sends commands TO the sim. For stuff like lights that get data FROM the sim, again, just select the switch/light itself, then look at the BINDINGS > INPUT > BINDINGS window.

Hope that helps!