The phrase " MSTS - Addon - Routes and Trains -5 of 6-" typically refers to a specific split or multi-part archive file (part 5 of 6) used in the community to distribute heavy add-on content for Microsoft Train Simulator (MSTS) or its modern successor, Open Rails.
If you try to install Part 5 fresh, you will get the infamous "Failed to load SMS file" error. Ensure your TRAINS\TRAINSET folder contains the default GP38 from Part 1, as many Part-5 consists use it as a "slug" unit. MSTS - Addon - Routes and Trains -5 of 6-
TrainSimulations: Excellent for high-quality starter routes and freight car packs. The phrase " MSTS - Addon - Routes
This part covers installing, configuring, and troubleshooting complex third-party route and train addons for Microsoft Train Simulator (MSTS). It assumes you already know the basics of MSTS addon structure and have completed parts 1–4 (packaging, basic installation, rolling stock basics, and simple route editing). rolling stock basics