Hi Doc,
unfortunately no.
I think BIAB has a function that can convert midifiles to BIAB styles ie create a midifile from a Yamaha style then convert midifile to BIAB.
Don't think it would be terribly suucesful though.

Is there a particular reason why you would want to convert them to BIAB?
If it's the type in a chord, pick a style & play function that you're after, there's easier software options available for working with psr styles.

best wishes
Rikki