You must install and run SFM with Administrator privileges. If you are on Windows 10/11, do not install it in C:\Program Files (x86) . Use a neutral folder like C:\MSTS\Utils\ or C:\Train Simulator\Utils .
Before uncompressing or scaling any .s file, create a copy of the original file (e.g., locomotive.s.bak ).
To ensure the "Compress/Uncompress" features work, you must link SFM to the MSTS utilities:
Re-encode edited text files back into the optimized format MSTS requires.
Navigate to your SFM folder via the command line:
Any questions, just ask. Hope this helps someone still building routes in 2025!
If you get "Module loaded but entry point not found," the OCX files are already registered. Proceed anyway.
: Easily open .S files to edit them in Wordpad or another Unicode editor. Scaling : Resize objects along X, Y, or Z axes.