Transferring data into travel manager

All,

in our company we have an external application where the employees enter their travel data. When finished it is transferred into temporary tables within SAP.

From there we have a report which at least calls the function module BAPI_TRIP_CREATE_FROM_DATA.

But this FM uses the transaction "PR01" which is not longer supported under SAP ECC 6.0. I found another FM HRTRV_IF_MODIFY_TRIP but this also uses "PR01"... ;-((

Does anyone know a FM or method which uses "PR05"???

Thanks a lot in advance