Just a small note: When the railway stuff in Germany makes announcements for train lines with FOUR digits (ex. "IC 2419") they say mostly: IC Vierundzwanzig Neunzehn (IC twenty four nineteen)
In RWEnhancer2 they say: IC Zweitausendvierhundertneunzehn (IC Two thousand four hundred nineteen)
Don´t know if its possible to change this.
for example see here