Intercompany External Transactions ?

Hi there, anyone any ideas of how to perform an intercompany bank transfer via the external transaction page ? 

This is where a cash receipt has been received into the wrong bank account. Users currently perform an external transaction to remove the item from the reconciliation and then perform a journal to move the cash from one account to the other. The manual journal that is created is causing me a problem in my book to bank reconciliation as the bank statement entry has been reconciled to system trans (external transaction), but the journal entry remains as a balance on the bank account side as it has nothing to reconcile to. I am looking at a customisation to remove these historic transactions which will remove them from the reconciliation, but in order to fix the business process going forward, I would like the external transaction to perform the same transaction as the journal.