Permissions:disable controls by roles(access pages too)(dynamically :each new role has special grant)

Hello
I have an application of many pages of consultation and same time I have a module of adding users by roles and creating accounts by role.(the application is ready but i cant manage the roles)
the tutorials that i found are very useful to manage roles but its roles fixed before(administrators,supervisors)
(http://www.asp.net/security/tutorials/creating-and-managing-roles-vb)
 if I add a new role (agent) i want to grant to this new role a new access to pages(different access than admin and supervisor)
and disable new controls
why not using checkbox to every new role checking a field related to database
is it possible?if yes ,how can i begin?
Thanks




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