Using Membership and adding Additional information - Creating BO for it..

Hi,
I would like to know simple thing,
If i'm adding additional information to UserProfile such as: Country, PhoneNumber etc'..
So, 
I added a Table In my DB (which also Got all Membership Provider tables...)
UserProfile,
and added Stored Procedures for it for Insert / Update...
I would like to know,
If I need to create in Business Object a Class for Profile Only? (Cause the User is managed Already by the Membership Provider)
And Create for it Also in Business Logic -> ProfileManager with Methods that will use the Stored Procedures to Update and Insert Details?
Do I need to do it like this?
Or there is another way?
What's the right way doing it?

Thanks..
...