I was under the impression that this mod did not work with GWX-GOLD so I never tried it. I ran it with Vanilla (just had two different installs).
I understand what you are saying..if you read this thread from start to finish theres some saying one thing and others saying another thing.
Make it simple on yourself if you have not done so already.
Copy the UBISOFT folder under C:\Program Files\Ubisoft and paste it into another folder like I do C:\Program Files\SH3GWX and download this Mod into it. If it does not work then just delete the entire folder.