Payment Request Security

We are setting up Payment Request in 9.2 and have a question as to the process flow.

Under Employee Self Service, Payment Request Center, we are going to have our users key in their requests.

We would then like for our AP Department to be able to manage these requests under Accounts Payable, Payments, Payment Request, Payment Request Center.

Based on some initial testing, the Accounts Payable navigation is just for Reviewers of a Payment Request.  In our example this would be the employee's supervisor.

We would like for a group of AP individuals to be able to see "ALL" Payment Requests.  Is this possible?  If so how should we set it up?