Malcolm - the set up *is* more complex as the MK2 Combo is NOT just a re-boxed version of the MK1 Combo where you could only select one of three engine sounds and the number of cylinders. Instead, you now have 9 engine sounds to choose from, and as well as setting the cylinder count you can also set tickover, topspeed, idling timeout value, joystick neutral and span plus there is a 'demo' mode (for shows etc) where the ESC output is disabled so you can demo the engine sound without running the boat's motor(s).
I tried to make the setup as easy and logical as possible - N pushes of the button selects parameter N and use the throttle joystick to adjust that parameter, press the button again to accept the adjusted value. Values for N:- 1=neutral, 2=tickover, 3=topspeed, 4=cylinder count, 5=engine 'voice', 6=idling timeout, 7=demo, 8=neutral & span. Hopefully I've arranged them in order of decreasing frequency of access requirements.
But note the MK2 'petrol', 'diesel' and 'steam' versions retain the same simple set-up as the MK1's as you are limited to just setting the number of cylinders and the (externally accessible) push button simply replaces the (internal) link.