Bud
If all else fails you might check out the EBay listings for S550 buyers and sellers. You might be able to convince one of them to Email an utility file to you. I would do the same for all the links listings at the Roland links page. It must be a bummer to have a unit like the S550 and not be able to use it. If it were not for Mgomes, down in Brazil, I would be in a similar situation. I will never be able to thank him enough for his patience and understanding. Hopefully, you will find someone like him to help with your situation. Onward, and upward.
Majik