Thanks for your response.
You're right - there isn't a bank for it. I probably read somewhere that there are GM sounds in the TX81Z, and I assumed an entire bank was devoted to GM.
Could you check though if, when you assign certain presets to the parts (bass, solo, etc.), that the presets stay the same, even when you change styles? I really would appreciate it!
Like I said I do very little work in BiaB and one of the things that I never have done is to use an external synth with it. I tried to get BiaB to see the TX81Z but I did not have any luck in doing so. I believe others are using external synths with BiaB so maybe they can chime in and help me.
I have to go now and I may not be around tomorrow but if no one can help me I will google and/or spend a lot more time trying to get things working.