Exchange 2007 subfolder Permissions.. how can I set them?

we have an exchange mailbox which is tied to our e-fax line. Basically when a fax is sent whoever sent the fax is supposed to move the confirmation that comes back into a special "Confirmations" subfolder inside the Inbox of the Fax mailbox. All incoming faxes just come into the regular Inbox.

So we have:

FAX Mailbox
--Inbox
------Confirmations

What we want to do is assign a person or group of people to handle moving the confirmations over and allow everyone else to only VIEW their confirmation once it gets moved into the confirmation folder.

Is it possible to make it so that people can have read-only access to JUST the confirmations folder and not be able to move anything around or view other items that come into the Inbox if they aren't inside the Confirmations folder?  If so, how would the users reference the mailbox? Before we just gave people Full Access Permission and added it to their accounts in Outlook.

Any help is greatly appreciated.

Server: Windows Server 2003
Exchange Server 2007

all users are on Windows XP using Outlook 2007.