Before you enable any mod
always right click on it with your mouse and select 'Explore.'
If you can see the 'Data Folder' then you have enabled the mod correctly.
If you cannot see the 'Data Folder' then the mod is probably sitting inside the 'Folder' you can see.
If you have already enabled the mods then do the following.
Go to: example C:\Ubisoft\Silent Hunter 5\Mods
Right click on the 'Mods Folder' and you should be looking at the 'Data Folder.'
If you can see the 'Data Folder' then the mod has been correctly enabled.
Link to my SH5 post:
STEP BY STEP TUTORIALS & HOW TO DO IT
http://www.subsim.com/radioroom/showthread.php?t=211804