Mod credit : MrCsam
Disclaimer : I am not responsible for any errors or issues caused by the installation of this mod. Use/install at your own risk. 

This mod adds variants for each of the in-game cabooses. It will appear in the spawn/purchase menu with the word "Charter" on the end.  

Before installing, back up the "ne-caboose" folders inside your "asset packs" folder to somewhere safe. 

1. Open Steam, navigate to Railroader, click manage and then click  browse Local Files
2. Move the folder titled "Railroader_Data" from inside Zip Folder to the main Railroader folder. 
3. When asked to replace or overwrite files, click yes. 

These modified cabooses act like passenger cars but have a limitied capacity. They're perfect for those who choose to roleplay a tourist operation.