Migrate step. Unicode transaction

Hi,

I'm migrating from 4.6d to mysap. And now I'm cheking with uccheck (transx) my custom programs for unicode enviroment.

I have a lot of warnings because i use obsolete functions modules (ws_upload and ws_download). And my cuestion is: Would I have to change every program from ws_upload/ws_download functions to gui_upload/gui_donwload functions?

If yes, Are there any source abap program to do it automatically?

A lot of thanks in advance.

Best regards.

djlu