Ann, if you have a Hex Editor and know how to use it, you may have some luck updating the files, but you will probably have no luck at all. Without the keyboards to step up with, as Fred stated, it's a chore. I've had some work and others that wouldn't work no matter what I did. I think Alec did a piece on changing the header codes and if so, it would be on Gunnar Jonny's web site. Probably best to put them back up for sale. Sorry.