Hello, I'm a newbie and this is my first post on this forum. Sorry if my English is weird, because I used a translator.

My intention is complicated (I think), I don't know how to do it but I want to learn (if that intention is plausible).
I intend to make a fictional map, but I don't know how to change the Nameplate and the destination in class 365, since I don't want to replace or change the existing destinations, I just want to add my own.

An example: class 365 has the thirteen digits "FFFFFFNSSSSSD" being N for Nameplate and D for Destination and it comes with a predefined list of Destination and Nameplates.
My intention in my point of view at least is crazy, but if by chance it is not possible I thank you for your attention.

My intention is to add a new Nameplate and Destination as: N being "circular express train" and D being "EndCity - Central City"

In my view at least it is crazy, but if by chance it is not possible, I thank you for your attention.

P.S: Sorry for repeating Nameplate and Destination too much.