Sadly its not as simple as swapping module from left to right or vice versa, if you think of the switch panel on our drivers side the left switch is the passenger side, on a LHD car the left switch is the driver switch, this isn't simple wiring wiring changes its software changes to let the module know if its RHD or LHD.
Fyi to anyone reading the Ross Tech write up about gen4 modules, they apparently can't get hold of gen3 modules in the US anymore? so VW are apparently suggesting gen4, this isn't a simple procedure for 2 main reasons, our gen3 modules are fixed to the motor the gen4 modules are separate so upgrading to these would also require the motor change as i don't believe there is an adaptor cable to use the old motor.
PLUS do not just plug in a gen4 module into an older car as the main power feed into the modules has swapped round meaning you'll just f**k the unit, gen3 positive pin 20 negative pin 19, gen4 positive pin 19 negative pin 20
also i have a few modules from mk6 golf, Scirorrco, Eos, Golf cabriolet, regardless of not having the electric fuel flap release on the actual car you can code it into the module as the pin is still there for the switch to input into the module.