Hi, you can modify RailClone properties from Maxscript or Phyton, as any other 3DS Max object.
Properties available include: General parameters, Base Objects, Segments and Exported Parameters.
To see all properties from MaxScript, use 'showproperties $', with a RC object selected. If you need help with some specific parameter, please ask us.
Instead, the Style definition is not available (it's stored in a custom format).
Said that, i guess your example would be done in Maxscript (or Python), using the tools provided by 3DS Max. Anyway, this question is more related with Max development, and goes beyond of RailClone support.