Rename a Visitor Role
You can only rename Visitor Entitlement roles that 
  have not been set 
  on portal resources. To rename a Visitor Role that is used on portal resources, 
  create 
  a new role with the name you want (using the same rules as the old role), 
  set the new role on the portal resources, remove the old role from the portal 
  resources, and delete 
  the old role.
To rename a Visitor Role:
  - In the Visitor Entitlements Resource tree, select 
    the Visitor Role you want to rename.
- Right-click the role and choose Rename Role (or 
    click Rename Role in the toolbar).
- In the dialog box that appears, enter the new name 
    for the role, and click OK.
- If you receive a message that you cannot rename the role because you have 
    set Delegated Administration on it, and you still want to rename the role, 
    remove 
    Delegated Administration from the role and follow this procedure again.
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