Airtcon-161......funny you bring this up.

After all my efforts trying to get the midi to work and you guys in the forum taking the time to help me thru it, another fellow from Sonar forum suggested once I import the BIAB tracks into Sonar, to simply route the BIAB rhythm guitar track back to the Vocalist Live Pro and BINGO.....much the same as you are doing except I don't have to even record another rhythm track myself.

I have to say, I actually think the Vocalist Live tracks better for some reason using the actual rhythm track routed back into the front end.