It has been tried. There's quite an extensive body of knowledge on putting large disks into the player. pgrzelak was one of the first to start. Search around for his posts on large disks. IIRC, the problem isn't the player database, or Emplode -- it's the limited amount of RAM available on the player for manipulating the database, in conjunction with limitations in the player, on how many FIDs you can keep in a playlist (the max is 43648, thanks to Mark).