How can we Integrate P-Card with iExpense?

We're on EBS R12.1.3 and currently use a custom P-card process.  We'd like to bring the p-cards into iExpense like we do our corporate travel credit cards.  I've not found anything on how that should be done.  I found a white paper, Procurement Cards Basics:  Setup and Processing that describes a process whereby transactions are loaded into ap_expense_feed_lines_all whereas corporate cards that we are importing into iExpense now are loaded into ap_credit_card_trxns_all.   It doesn't look to me that these go through the same process or that the transactions end up in the same place to be viewed.  I found a