RTF is a global modification that replaces all towns in the game.

https://p3dm.ru/soft/3d-grafika/9256-3d-object-converter-530.html

This program reads models, so you don't have to worry about extracting them from the game. Here's an archive with all the models and textures; Zakhar sent it to me: https://disk.yandex.ru/d/pLEqwOk-Nt_VOQ