Loading Items and Receipts from External System to Peoplesoft.

 I am looking for some help on a couple of things. We have a purchasing system outside of peoplesoft. Now we are trying to implement matching in peoplesoft, so, we are required to interface the receipts and items into peoplesoft. As far as items are concerned, it will be the basic information that is required to be able to use the same on the reciepts and vouchers, since we have the master table in the legacy system. Now, my question is...is it possible to use the item staging tables and receipt staging tables to load the external data and then