Note: “Exhaustive” here focuses on all practical steps most users will encounter installing and using SFM 2.5 for Microsoft Train Simulator (MSTS).
This is a step-by-step, chronologically ordered guide covering preparation, installation, initial configuration, common post-install tasks, and troubleshooting for MSTS Shape File Manager 2.5 (aka Shape File Manager v2.5). It assumes a Windows PC (MSTS runs on Windows); if you need a different OS, say so.