What is the latest O.S. for PSR2000? How to check it? what are the changes in new and old O.S., and one more question initially on the Yamaha website they wrote that PSR2000 operating system is upgradeable now that line is gone, it is still can be seen on some websites, now I have been following the previous threads and I have noticed that Tyros suffer from the same type of flash rom as PSR2000 it might be bigger but basically the same trouble, but Yamaha representative (Steve) said it would be upgradeable if Tyros operating system can be upgraded why can't we upgrade the PSR2000 O.S. via floppy? Is it only because TYROS is $2500 and PSR2000 is $1200 After all it is not a $100 Casio keyboard it cost more than a grand, most of us (at least me) can't afford to upgrade every now and then, so what is the deal Yamaha?