It's extremely easy. Of course, disabling the music in the settings and launching Winamp is even simpler. Essentially, all the compositions are in one folder, and any user can easily take their favorite songs, change the names to those that match the "heroic tracks," convert them to the format of these tracks, and finally replace them.
Dear developers, perhaps you could shed some light on this mystery :D?
Цикл "Закадычные враги": "Особенное гостеприимство, "Супероружие", "Меж молотом и наковальней"
"Падение Шантири"
Кампания для "Кодекса Войны"
"Выбор Сагиттеля"