Avoid to have several different Roles to maintain

Hi ,

I'm new to the portal admin/development. Until now when we have a new "functionality" we copy a existent portal role and remove or add "pages"/"i-views" to it . So we have many roles which are very similar and that become challenging to be maintained .

Is there another solution (Portal framework) to hide or allow some "pages"/"i-views" to users without having to create and assign different roles .

For the moment role A can have pages 1,2,3,4,5,6,7 role B will = role A without page 7 .

Any presentations or information will be welcome .

Regard's