Can Grouped CIP flag be selected via the Project Transaction API?

My client has been interfacing asset lines from AP directly to FA, and has been posting the asset lines every month.  Now we are implementing PA and trying to figure out how to convert the data from FA to PA in order to give Project Managers a proper view of the costs on their projects.  Our concern is re-interfacing these converted transactions at the time that the asset is being placed in-service, since we plan on keeping the original transactions in FA.  So far, we plan to select the GL Accounted flag on the transactions to ensure that the transactions