Sibelius does have default support for some of the older keyboard models, though Tyros 5 isn't one of them.
Alan, you may want to check to see if Jonathan Loving has one at http://www.soundsetproject.com/soundsets/yamaha/. And if not, go ahead and ask him if he has one in the works. Since he has them for Tyros 1-4, there's a decent chance it's on his radar (and he would be able to get to it before I could anyway).
Alan, you may want to check to see if Jonathan Loving has one at http://www.soundsetproject.com/soundsets/yamaha/. And if not, go ahead and ask him if he has one in the works. Since he has them for Tyros 1-4, there's a decent chance it's on his radar (and he would be able to get to it before I could anyway).