swapping the side of cars is relatively easy, the vfss came rhd. all it takes is to flip the interior, and flip back things like the steering wheel badges and the dashboard.
That being said, I will never make rhd cars. There's nothing wrong with lhd models as they are and mucking around with the game too much, like flipping the door entering animation to suit right hand drive, and changing what sides of the road cars drive, will bring up far too many bugs that we don't need.