Set user profile dir by command line

[MCorgano]

I've been using wiimmfi, and my issue is when i want to run multiple versions of dolphin, i need to copy the ENTIRE dolphin folder just to make it use a different user data folder for each copy. Is there any way to start dolphin with like a --user-data flag so I can just have one copy of dolphin?

[JosJuice]

Yes. The flag is -u or --user.