Casio CZ/ VZ/ FZ - Pro Series

hi all 

 just downloaded all the sample disks over the net for the casio 
sampler and would like to know if its possible to convert the pc files -
 fzf format - to casio readable disks...is there any kind of utility 
that can do this without the need to transfer the samples over midi and 
fz dump ?...any help would be great...

  thanks
    

  ps do i need an older pc running win 98 or it can be done through win 
xp as well ?....