The other setting is in the steering wheel controller, just went out and checked it.
There is no long coding helper for this you just need to manually enter the number.
The coding screen looks like this

and the options are as follows.

Its the setting with PTT installed you want to change.
At the moment mine is set to
6 - Multi-Function Steering Wheel with Tiptronic and no Push-To-Talk (PTT) installedIf I wanted to change the function of the button I would add 2 to this value and change it to
8so my value would now read 0001832
Hope this helps
