So heres aquestion to the modders
 

There has been many mods to change hoe the game looks and stuff and one big mod that changed it to american subs in the pacific. But has anyone thought of doing a mod to change it to British against German boats?? And by the way the brits did have a sub fleet ,I looked it up before i asked this,It dont have to be historically accurate but it would be different??

it "can" be done, but its a HUGE under taking involving many hours of hard work and testing followed by many more long hours of hard work then testing again.

doing a mod like that can easily take a person 4-6 months of work working 4-5 hours a day 3-4 days a week.

if you want to do it, there are many here who can guide you to help you find the files to edit and sort out problems, but at the end of the day, a whole lot of stuff you just have to spend hours searching the game files and finding the right files to make the changes you want to make.

If you have SH4, there's a British campaign, We Dive At Dawn, in the Community mods section