Roles and Navigation

Hi,

Our portal environment is NW04 Stack 11. Let me describe what I am trying to do.

Top Level Navigation tab -> Folder F1

2nd Level Navigation for Folder F1 -> F1a, F1b, F1c

Detailed Navigation for F1a -> Public, Private

I know how to set up the PUBLIC folder so it appears for all users but how would I set up the PRIVATE folder to only appear for selected users?

Any assistance would be most appreciated.

Thanks,

Kris