This is the D&RGW Narrow Gauge Locomotive Pack; if you came looking for standard gauge equipment for the Minecraft mod Immersive Railroading, you have come to the wrong place.
This resource pack adds many new Narrow gauge locomotives to the game, primarily from the Denver & Rio Grande Western Railroad (D&RGW). From scrawny 0-6-0T's to 2-8-2 Mikados, this pack has a variety of locomotives! This pack is applied via the resource pack tab, make sure you put the .zip in your C:\Users\[your user]\AppData\Roaming\.Minecraft\resourcepacks Folder!