I am completely new to this modding business, but very eager to get into the files and mixture with them. :)

Now I followed the steps in this guide:

https://forums.totalwar.org/vb/showthread.php?t=76289

I tried both the mod folder approach and the io file approach, but both yield the same result: when I try to launch the mymod.bat a command prompt pops up for a few miliseconds and then nothing happens. I managed to get a screenshot where I could see the message and it said (translated from swedish):

medieval2.exe is not an internal command, external command, program or command file
Which makes no sense to me as when I click the medieval2.exe file manually the game launches...

Second question: In the above linked guide it is suggested that you test if you set it up right through editing the name of a city, in the file text/imperial_campaign_regions_and_settlement_names.txt. However I am quite unable to locate that file at all...

Any help much appreciated. :)