Page access for different Roles using Custom role provider

Hi All,
In my project we should allow the page depend upon the roles. We are having 4 different roles 1.Admin 2.Manager 3.Supervisor 4.Accountant .
The accountant is having access for only 4 pages . All others are more than 10 pages.
In the furture we will add a new page , Any of the four roles will be allow to access.
We are having the table it contains user and related form names.
How do i restrict the page access  using custom role provider ?


Thanks,
Saravanan