procurement cards (PCards) as payment for vouchers

We are wanting to setup procurement payments in the payables system.

We have a 3rd party that will handle the invoice payment to the vendors but how is this handled in the peoplesoft payables system.  We will notify the third party of the payments to be made weekly but will only have to pay the third party once a month for these payments.  I have some doucmentation - but it is not answering my questions on setup.

Is there any other PS users currently using PCards and how are they set up in their systems?