1. You download Sea Dogs: City of Abandoned Ships on gog.
2. You go to this site
and download Gentlemen of Fortune 2.0.
3. While downloading, also download the 2.15 patch on here
4. When you've download Sea Dogs. City of Abandoned Ships and the 2 mods, click on the GOF 2.0 Full Release.exe
which tells you to extract the files, just unzip them at any folder of your choosing. I've choosen to create my own folder.
5. now with this done, click inside the folder and drag-and-drop the files inside your main Sea Dogs: City of Abandoned Ships folder (the one you have when you installed the game, the one with the LANGUAGE, moldules, Program folders in it)
6. Now, click on the COF full 1.3+1.4b+1.5b patch.exe
and click on it. It will tell you to choose the directory where Sea Dogs: City of Abandoned Ships is located, which is the same directory you've drag-and-dropped the contents of the GOF 2.0 folder on.
7. When you installed the patch, you're ready to go. The mod is successfully installed when a different into and main menue shows up. If its not, something wrong has happened.