It is not possible to pay a vendor with another vendor.  A bank can be created for the credit card, for instance Visa, and the obligations can then be paid though this bank.
 

This will create the obligation and payment transactions for each invoice.  Details of how that will work will be up to you, the client.   Decisions will need to be made as to which general ledger account to use with the bank, whether or not to record the credit card payment through AP and which accounts to use in that transaction.

1.  Create a new bank in FundWare for Accounts Payable to be used for credit card payments.  
2.  Process manual checks for the invoices paid by the credit card through the new bank.