Hi, if you have the correct column switch (Mini call it SZL) and you fit it then your HiFi controls should work without coding. The Cruise needs to be activated in SZL, that is correct. Also note that if you do not have the clock spring (center revolving part) in the right place you will get the trifecta warning lights (ABS/Brake and DSC) coming up and your indicators will not reset automatically, this is because the clock spring is also the angle sensor, so you'll need to adjust it. Trial and error inless you have a programme that can see the angle (INPA does this). Not much help but it is doable, if I did it anyone can :-)
Cooper 2009, R57.