Disklavier

I know that Lion broke the ability to directly access the Disklavier's file system. DKV Browser doesn't allow dragging from the Mac OS to the Disklavier folders, either. I've seen suggestions that the only way to fix this is to have a separate system running Snow Leopard, which seems a little silly. Is there no other way? This has been an issue for months (since the release of Lion), and it's hard to believe that nobody has come up with a simple solution, but I haven't found one. As an alternative, I've tried dragging files from a USB drive via DKV Browser (that is, attaching the USB drive to the Disklavier, then dragging files from a folder on that USB drive to a folder in the user folder of the Disklavier), but the names become modified (shortened considerably - so "Toru Takemitsu - Rain Tree Sketch II (KimG-02).mid" becomes "RainTreeSketchII-GraceEunHaeKim" - removing any mention of the composer -- presumably it's taking this from the MIDI file itself, but I don't understand why it can't retain the file name, even if it's shortened), and the app also doesn't allow the dragging of full folders.

Any easy (as in, non-terminal-related) suggestions? Are Mac users forever out of luck when it comes to accessing the Disklavier file system directly?