So in the end the patcher IS a command line hex editor! Oooook!it changes the trek.exe selected as soon as you click apply button
Ah, now I see that!The post you linked if for setting up a mod for release in a separate install path with registries. the code you asked about is to change prefix of mod (the install path folder name) UDM, UDML, BOP, UM5.....
Thanks a lot, thunder!
A last question:
Where are the other genial people of this forum, like quasar donkey, tribble and cia? I only see you answering people around.