Hi there - Still have the GX5 - never did ascertain whther the disk drive is reading correctly. On powe-up the drive lights up but the floppy disk that I acquired on purchasing the organ I have now cleared so I cannot check whether it will work re your instructions.

I have not played the organ since Christmas as my main musical interest is keyboards. It is presently looking for a good home but unfortunately have found one for it yet.

It would be a help if you could send me a file of some sort and then I could put on a floppy disk and try it out - thank you for taking the trouble to answer this query. Joan