Why?
Some files must be setup as Global files for them to work correctly, for example RRT_Goods XML file. Global files have the same name as the masters file in the SMR install proper. The game will load whichever one of these has the latest timestamp. Custom maps were made after the game was published, at least the Windows version. Some early maps do need an update of their XML’s timestamps for the MAC version.

If there are multiple maps “installed”, the latest one will work fine, but the earlier ones will also try to use parts from the latest map and therefore never work. We could change the timestamps, but recommending one map at a time is far simpler to follow for the average user.

What I do is have the zips for a lot of maps in my UserMaps folder, but I only have one unzipped at a time. When I want to play a new one, I delete the current one, then unzip another.

There is one more fix for the game, found on the game’s page on pcgamingwiki. This is a low memory crash fix. I think this is more than just LAA. For example, I believe it allows you to build as long track sections as you like.

(2) Download the 4GB Patch: http://www.ntcore.com/4gb_patch.php
Therefore, once you download it, open it up, then find your Sid Meier’s Railroads folder on your C Drive/ Program Files(86) / 2k Games / … and click on the “TRAIN ICON (.exe). It will immediately do the job and it done, just like that No more crashes at all.

(3) For Those Using Windows 10:
Click on “This PC >>> Documents >>> My Games >>> Sid Meier’s Railroads!” THEN make a New Folder in there called “UserMaps” (Without Inverted Coma’s).

(4) Place your Map and .FPK File in the UserMaps Folder. Dome here previously mentioned that you can only have one Map at a time in the UserMaps Folder. I don’t know if this is true. Just test and see.

Right now I don't have a clue and will give further feedback when I work it out.

I'm trying to get the Australia Map working, but froze up my PC and had to reboot a few times.

————————————————————————-
TIP 1: If you click on “Settings.ini” and open it up (No Special Program Required), you can disabe the intro movies (Company Ads) by adding the number 1, instead of zero (0) after the equal sign, then save in top left corner. By doing this, you won’t have to keep hitting “Esc” to get to the player page.

SkipOpeningMovies = 1

————————————————————————
Tip2: The best hassle free easy to use program for setting your SMR to 4GB is not the 3GB Enabler, but this one which takes one minute to do and works for all Old Games that only used 2GB:
/////////////////////////////////////////////////////////////////////////
CREATED by Daniel Pistelli: 4GB Patch
Current Version: 1.0.0.1
Download the 4GB Patch: http://www.ntcore.com/4gb_patch.php

His notes about it:
I originally wrote this tool for a friend of mine who needed it. This very little tool patches x86 executables in order to let them have 4GB (instead of only 2) of virtual memory on x64 platforms. This tool comes very handy for applications which need a great amount of virtual memory like games, 3D renderization, multimedia etc. To gain these 2GB, you just have to use this tool to patch the executable (*.exe file) of the software you want to have these additional GBs of virtual memory. It can be used by clicking on it and choosing the file or through command line (e.g.: “4gb_patch file.exe”). It automatically creates a backup copy of the original executable.

Why things are this way on x64 is easy to explain. On x86 applications have 2GB of virtual memory out of 4GB (the other 2GB are reserved for the system). On x64 these two other GB can now be accessed by 32bit applications. In order to achieve this, a flag has to be set in the file’s internal format. This is, of course, very easy for insiders who do it every day with the CFF Explorer. This tool was written because not everybody is an insider, and most probably a lot of people don’t even know that this can be achieved. Even I wouldn’t have written this tool if someone didn’t explicitly ask me to.

Daniel Pistelli
///////////////////////////////////////////////////////////////////////////
Therefore, once you download it, open it up, then find your Sid Meier’s Railroads folder on your C Drive/ Program Files(86) / 2k Games / … and click on the “TRAIN ICON (.exe). It will immediately do the job and it done, just like that 🙂 No more crashes at all.