The information in this article applies to:

Folder Security
HELM Control Panel
ASP.NET 2.0

ANSWER:
To password protect folder you can us the built-in method within the control panel. First login to the control panel > click 'Domains' > click on the domain name you wish to administer > 'Secure Folders' > Install > now you can create the username with access and create groups that the users belong to if you wish. Once setup click > 'Folders' > 'Add New' > select the folders you wish to protect and then add the users/groups that have access. If you require something more complicated then we suggest ASP.NET 2.0 for developing a Role Based system.