BODS 4.0 - Custom Transfer Method (SFTP) & ABAP Data Flow

I'm using the custom transfer method as a data transport method in BODS 4.0 because I want to transfer files through SFTP. The SFTP connection is working perfectly. However, I have a question here :

• SFTP/FTP can be used only with ABAP Data Flows ? Can't I use it with Normal Data Flows ? If it can be used with normal data flows, then how do I know the name of the file that SAP will generate and put in its working directory.

In ABAP data flow, you specify the name during creation and then pass the $AW_FILE_NAME variable.