Hi Hardigen
Your installation should be something like:
C:\Ubisoft\Silent Hunter 5
Your 'Mods Folder' would be in the 'Silent Hunter 5 Folder' above.
You should also have a 'SH5 Folder' in your 'Documents Folder.'
Let me know if you need any more help
Link to my SH5 post:
STEP BY STEP TUTORIALS & HOW TO DO IT
http://www.subsim.com/radioroom/showthread.php?t=211804