Disklavier

Ok - new to the group.  Just got a Mark IV Disklavier, looks great.  
Problem is, went to purchase some files from yamahamusicsoft.com 
tonight, and when I downloaded the files, the yamaha musicsoft 
downloaded told me to insert a FLOPPY DISK into Drive A.  You have to 
be kidding me? Drive A? I have not seen a floppy disk drive in years, 
the salesman at the store told me I could save all the files on my 2gb 
Flash USB memory card, and plug it directly into the Disklavier.  
However, the files which I downloaded onto my computer show up 
as "YAMAHA MSD" files, and appear with a key icon next to the file 
name.  Anyone know how to open these files and put them directly onto 
the USB memory card?  I am going to be quite upset if I have to go out 
and purchase a floppy drive for my laptop here...
THanks,
C. R. Wolchok