Bob, there is a copy function for SD files in the machine.
It's perfectly possible to drag and drop non-audio files to the SD card, you just need to update the kn7000mn.inf file with a hex editor in the correct data blocks. Then the keyboard will 'see' the new files. I sent all the relevant information in as a suggestion as soon as I got my 7000. From John's answer it seems they are looking at it. The 7000 site is still relatively new, lets see what turns up