Updates for existing MSTS routes

[skaliwag66]

I understand there are some updates at the file library for existing MSTS routes. I was wondering which files to look for and to install.

[tpilot]

Not sure of the file names, but:

NEC 4.0

For Marias, there are a number of choices:

Marias 3.1 is probably the most popular (there are others).
The GN Highline also covers this area.

There are also lots of standalone routes that extend onto the existing Marias, such as:

Whitefish 7 (or previous versions which are still available)

Marias Koontenai (MP3K).

There are probably others as well.