Hi Barry,
I have a few KN2000 floppy discs so I copied them to my PC and then attempted to download the files via USB to my KN7000, using the Song Manager program. No luck I'm afraid When setting the PC folder location in Song Manager to the folder which contained the KN2000 files, the program did not recognise the files and the left hand window was blank.
I then tried to load the files using the floppy disc drive on my KN7000 and everything worked fine. Although a little octave tweaking was required, the styles are perfectly usable. I then uploaded the files via USB from the KN7000, to another folder on my PC.
I opened Song Manager again and changed the target folder to the new folder which contained the KN2000 files, which had been uploaded from the KN7000. All the files were now visible and could be downloaded successfully via USB to the KN7000.
So, it would seem that the KN2000 file format is not suitable for direct transfer from PC to KN7000 or KN2600.

The only solution I can think of would be to use the conversion program EMC Style Works.
http://www.emc-musicsoftware.de/

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Willum