Changing a floppy drive to a usb drive

Hello I bought a usb drive for my Yamaha psr740 on ebay a while back as my Floppy drive wasn't working properly and after asking the supplier for help in installing it it worked Ok. For the past few months I haven't been using the keyboard as I was wasn't working due to circumstances.
Now I have tried to play midi files on it and it tells me that there is no file on the stick. I remember the person I bought the emulator from sent me a small file to use but I have lost it and the note he wrote with it.
Is there any file I can download to help me get this thing up and running again without having to buy another one.
Hope you can help.
Many thanks,
Regards
Peter Moloney

email:

petmaldsl@eircom.net