[Pellaeon]

First of all, thank you very much for your help.

I thought I´ve read all the pdf stuff in the support folder.

My basic SH4 install folder is:
"E:\Ubisoft Game Launcher\games"

inside this games-folder there is the normal "Silent Hunter 4 Gold Edition" installation. So it looks like this:
E:\Ubisoft Game Launcher\games\Silent Hunter 4 Gold Edition

I copied the "Silent Hunter 4 Gold Edition" folder two times, each for an mod.
So inside the "games" folder it looks like this now:
"E:\Ubisoft Game Launcher\games\Silent Hunter 4 Gold Edition"
"E:\Ubisoft Game Launcher\games\Silent Hunter 4 Gold Edition - tfotrs"
"E:\Ubisoft Game Launcher\games\Silent Hunter 4 Gold Edition - german"

Each SH4 mod folder has one mod with the jsgme file and, of course, I run the Large Address Aware applet.

Up to now: every thing is correct and should work?

Regarding the multish4v1.5: I used it but nothing has changed. I guess I understood something wrong.
I deleted the SaveGames folder in:
C:\Users\user name\Documents\SH4\data\cfg\SaveGames
run the MultiSH4v1.5, entered "FRS"
start the game (again no mod was started)
started a short game, saved it, quite the game and?
Nothing. The saved game was in:
C:\Users\user name\Documents\SH4\data\cfg\SaveGames
No "FRS"-folder, nothing.

I guess I missunderstood something terribly wrong.