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Modding the trains

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I'm playing jeffryfisher's US History mode and I found it fantastic but they are few minor changes that I want to make. My intension is to make a game more adeqate to 90'-2000' time period. It's all about modding a few trains in the game, and I don't know how to do that. 

I know only this:

-It's all about moding RRT2.exe in hex editor

-graphic can't be changed

-names of loco's can be changed in default2.lng file

My intention is to change entry and exit date, reliability, fuel consumption, grade caracteristic, speed and names for SD45, SDP40, GP-18 and Dash-9 . Specifically I want to convert GP-18 to ALCO RS-3, SPD45 and SD40 to GP-38 and SD40-2, DASH-9 to modern GE Evolution Series loco. I think that default game graphic is adequate for that kind of "conversion".

I'm a aircraft modeler, not a programer but I have a benevolent family member who is willing to help me. I only need a basic instruction how to do that. RRT2 is one my favorite game and this project is very important for me. 

Thanks for help ;)



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If you have the disk version of the game patched to version 1.56 (or my mod of that version), then you can use my spreadsheet (EXE Data.ods) to guide you. ODS is a LibreOffice (freeware) format.

If you have the Steam version of RRT2, then you have much more work to do to find the data tables deep within the EXE (they're toward the end). However, some text (like engine names) are searchable. Also: The data tables are made of fixed-length records, so just scrolling through in a hex editor you'll see regular patterns of numbers among the zeros to suggest where tables are.

It goes without saying that you should make backup copies of files before editing them.

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