The mystery solved. The EPROM version files actually are correct, but it is kind of tricky.
When I complained about that the upgrade file is not working, then I heard from couple dudes that --
-- in fact first time when powering up with that new firmware eprom man has to... CLOSE THE JUMPER J1.
Now, HOW THE f**k I was supposed to know THAT?!??
Further more : I searched with my friend a Service manual, just to get to know more about that strange jumper thing. Nothing! In that FS1R service manual was NOT A WORD about that jumpers meaning or its upgrade procedure!!! Only guess was a CPU line (and CPU had only adhesive label Yamaha XV100A).
That information come from these persons who had that upgrade file, however they did not said it in first place.
When I asked "where from THAT information comes? Service manual says nothing about it!" then the answer was "from a couple other fellows who upgraded first time their FS1R, said it".
THe mystery was solved, but I am very angry -- undocumented informations around which are not even service manual!
So, not only the upgrade procedure makes this rack synthesizer unique, but also lack of documentation and strange ways how the information is passed on.
However, if someone wants to upgrade their FS1R, welcome, I have now made it affordable . No silly 100$ prices anymore around there.
And pliis pliis... send me some chips. EPROMs.
), I had absolutely no problem to get my synthesizer running... 
