Edit: So your Fast Lane Stuff directory would be "Programm dateien (x86)\Electronic Arts\Die Sims 3\Die Sims 3 Gib Gas - Accessoires"?
Not just "Programm dateien (x86)\Electronic Arts\Die Sims 3 Gib Gas - Accessoires"?
My Sims3 directory Structure is as follows
The Sims 3 64-bit directory: "D:\Die Sims 3"
The Sims 3 World Adventures 64-bit directory: "D:\Die Sims 3\Reiseabenteuer"
The Sims 3 High-End Loft Stuff 64-bit directory: "D:\Die Sims 3\Luxus"
The Sims 3 Ambitions 64-bit directory: "D:\Die Sims 3\Traumkarrieren"
The Sims 3 Fast Lane Stuff 64-bit directory: "D:\Die Sims 3\Gib Gas"
It still doesn't launch the 3booter.exe. Same error like the one before.
Edit: Strange enough I checked your batch file. Normally I'd say it should start, and I can execute 3booter manually. *ponders where the error is*