This guide will provide the steps to get multiple versions of TANE or TRS19 installed and operating independently from each other. You can then run these builds simultaneously if you want to (but of course frame rate will suffer if you do this)

1. Install the game as per normal (e.g. game is in D:\TANE_game\Build_A and Local Data Folder path is C:\Users\<username>\AppData\Local\N3V Games\TANE\build xxxxxxxx
2. Copy everything from D:\TANE_game\Build_A into D:\TANE_game\Build_B
3. Click on Tane.exe in D:\TANE_game\Build_B and the launcher will appear
4. Add your username to Settings > Internet
5. Click Start Trainz and a new Local Data Folder will be created in C:\Users\<username>\AppData\Local\N3V Games\TANE\build xxxxxxxx
6. You can the follow the steps in the Move Folder article if you don't want your Local Data Folder on C:\

For TRS19, replace any reference to 'TANE' or 'TANE.exe' with 'TRS19' or 'TRS19.exe' respectively.

Note that if you have a Gold Membership or a Trainz Plus membership, then it is not permissible to run multiple copies of Trainz versions obtained through your membership simultaneously (they can be installed multiple times, just not multiple installations run simultaneously).