Here are the project details,
We need the logins, sessions and personal information to be shared between the two
When a user logs into phpBB, they are logged into oscommerce
when a user logs into oscommerce, they are logged into phpbb
the same needs to happen when they log out of either application.
additionally, when a user or admin modifies login data in one application, it needs to be modified in the other
(mainly email, username, password, Full Name)
If any queries please feel free to ask.