I have some files lying around from my own mod-attempt.
Create a Mod by creating a folder in your BTS's Mods folder...there...
unpack the files of
NewSpeeds.7z into...
Assets/XML/GameInfo
and the file from
GameText.7z into...
Assets/XML/Text
You have no .ini file in your folder at the moment... but just start BTS and load your new mod. Then exit the game and take a peak into the Mod-folder you just created. An .ini file should now have appeared, which you can change in Notepad (or similar programs).
PS! You can call your new mod anything you like, but I would recommend names like...NewSpeeds... or something like that to make you remember what the mod is all about.
You are of course free to modify the files to your personal preference... they are free to either use - or be inspired by. Just remember that you need all these three files in order for it to work properly. Well, the file in the Text-folder is just to make it better-looking in-game. It works fine without it...
And just to mention it: In the files I have modified the cultural defence-values to 0, 2, 4, 8, 16, 32 and 64 (in order to make Walls worthwhile to build). Change them back if you need...
And if I have forgotten something here... please just tell me (I'm not perfect, you know)!