In the UK modelling miniature railways is sometimes done. Britain has some well known 15 inch gauge railways e.g. the Romney Hythe and Dymchurch and the Ravenglass and Eskdale. In British O scale (1:43) N gauge track equals 15 inches. There are some kits for O9 (as this combination is known). N scale locomotives are sometimes used to represent miniature locos with modified tenders to take an O scale driver. For an example of O9 modelling seehttp://shiftingsands.fotopic.net/ On that site you will see a Bachmann N scale 2-6-2 modified as a miniature loco!
Hamish
Hamish